10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_______________

Form 10-K

þ	ANNUAL REPORT PURSUANT TO SECTION 13OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the fiscal year ended December 31, 2015
	or
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 1-2328

______________________

GATX Corporation

(Exact name of registrant as specified in its charter)

New York	36-1124040
(State of incorporation)	(I.R.S. Employer Identification No.)

222 West Adams Street

Chicago, IL 60606-5314

(Address of principal executive offices, including zip code)

(312) 621-6200

(Registrant’s telephone number, including area code)

Securities Registered Pursuant to Section 12(b) of the Act:

Title of each class or series	Name of each exchange    on which registered
Common Stock	New York Stock Exchange Chicago Stock Exchange

Securities Registered Pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes þ     No o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.  Yes o     No þ

-

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes þ     No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes þ  No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

þ Large accelerated filer     o Accelerated filer     o Non-accelerated filer o Smaller reporting company

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes o     No þ

The aggregate market value of the voting stock held by non-affiliates of the registrant was approximately $2.3 billion as of June 30, 2015.

As of January 31, 2016, 42.1 million common shares were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

GATX’s definitive Proxy Statement to be filed on or about March 11, 2016 PART III

GATX CORPORATION

2015 FORM 10-K

INDEX

Item No.		Page No.
Part I
	Forward-Looking Statements	2
Item 1.	Business	3
Item 1A.	Risk Factors	14
Item 1B.	Unresolved Staff Comments	21
Item 2.	Properties	22
Item 3.	Legal Proceedings	23
Item 4.	Mine Safety Disclosures	23
Part II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	24
Item 6.	Selected Financial Data	27
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	28
	Discussion of Operating Results	28
	Balance Sheet Discussion	45
	Cash Flow Discussion	47
	Liquidity and Capital Resources	50
	Critical Accounting Policies and Estimates	53
	New Accounting Pronouncements	56
	Non-GAAP Financial Measures	56
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	59
Item 8.	Financial Statements and Supplementary Data	60
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	110
Item 9A.	Controls and Procedures	110
Item 9B.	Other Information	112
Part III
Item 10.	Directors, Executive Officers and Corporate Governance	112
Item 11.	Executive Compensation	112
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	112
Item 13.	Certain Relationships and Related Transactions, and Director Independence	112
Item 14.	Principal Accountant Fees and Services	112
Part IV
Item 15.	Exhibits, Financial Statement Schedules	113
	Signatures	114
	Schedules	115
	Exhibits	119

1

FORWARD-LOOKING STATEMENTS

Forward-looking statements in this report that are not historical facts are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. These include statements that reflect our current views with respect to, among other things, future events, financial performance and market conditions. In some cases, forward-looking statements can be identified by the use of words such as “may,” “could,” “expect,” “intend,” “plan,” “seek,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “continue,” “likely,” “will,” “would” and variations of these terms and similar expressions, or the negative of these terms or similar expressions. Specific risks and uncertainties include, but are not limited to, (1) inability to maintain our assets on lease at satisfactory rates, (2) weak economic conditions, financial market volatility, and other factors that may decrease demand for our assets and services, (3) decreased demand for portions of our railcar fleet due to adverse changes in commodity prices, including, but not limited to, sustained low crude oil prices, (4) events having an adverse impact on assets, customers, or regions where we have a large investment, (5) operational disruption and increased costs associated with increased railcar assignments following non-renewal of leases, compliance maintenance programs, and other maintenance initiatives, (6) financial and operational risks associated with long-term railcar purchase commitments, (7) reduced opportunities to generate asset remarketing income, (8) changes in railroad efficiency that could decrease demand for railcars, (9) operational and financial risks related to our affiliate investments, including the RRPF affiliates, (10) fluctuations in foreign exchange rates, (11) failure to successfully negotiate collective bargaining agreements with the unions representing a substantial portion of our employees, (12) the impact of new regulatory requirements for tank cars carrying crude, ethanol, and other flammable liquids, (13) deterioration of conditions in the capital markets, reductions in our credit ratings, or increases in our financing costs, (14) asset impairment charges we may be required to recognize, (15) competitive factors in our primary markets, (16) risks related to international operations and expansion into new geographic markets, (17) exposure to damages, fines, and civil and criminal penalties arising from a negative outcome in our pending or threatened litigation, (18) changes in, or failure to comply with, laws, rules, and regulations (19) inability to obtain cost-effective insurance, (20) environmental remediation costs, and (21) inadequate allowances to cover credit losses in our portfolio.

Investors should not place undue reliance on forward-looking statements, which speak only as of the date they are made, and are not guarantees of future performance. The Company undertakes no obligation to publicly update or revise these forward-looking statements.

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PART I

Item 1. Business

GENERAL

GATX Corporation ("GATX", "we,""us,""our," and similar terms), a New York corporation founded in 1898, is one of the world's largest railcar lessors, owning fleets in North America, Europe, and Asia. In addition, we operate the largest fleet of US-flagged vessels on the Great Lakes and own and manage marine assets and other long-lived, widely-used assets. We also invest in joint ventures that complement our existing business activities. We report our financial results through four primary business segments: Rail North America, Rail International, American Steamship Company (“ASC”), and Portfolio Management.

The following description of our business should be read in conjunction with the information contained in our Management’s Discussion and Analysis of Financial Condition and Results of Operations included in Item 7 and the consolidated financial statements included in Item 8 of this Annual Report on Form 10-K. For geographic and financial information relating to each of our reportable segments, see "Note 23. Foreign Operations" and "Note 25. Financial Data of Business Segments" included with our consolidated financial statements.

At December 31, 2015, we had total assets of $7.4 billion, comprised largely of railcars. This amount includes $0.5 billion of off-balance sheet assets, primarily railcars that were financed with operating leases.

OPERATIONS

GATX RAIL BUSINESS OVERVIEW

We strive to be recognized as the finest railcar leasing company in the world by our customers, our shareholders, our employees, and the communities where we operate. Our wholly owned fleet of approximately 148,400 railcars is one of the largest railcar lease fleets in the world. With more than a century of rail industry experience, we offer customers leasing, maintenance, asset, financial, and management expertise. We currently lease tank cars, freight cars, and locomotives in North America, tank cars and freight cars in Europe and freight cars in India. We also have an ownership interest in approximately 2,400 railcars through investments in affiliated companies, and we actively manage approximately 600 railcars for other third-party owners. The following table sets forth our worldwide rail fleet data as of December 31, 2015:

	Tank Railcars	Freight Railcars (1)	Total Fleet	Affiliate Railcars	Managed Railcars	Total Railcars	Locomotives
Rail North America	60,470	64,105	124,575	2,375	590	127,540	637
Rail International	22,456	1,394	23,850	—	7	23,857	—
	82,926	65,499	148,425	2,375	597	151,397	637

__________________

(1) Includes approximately 18,400 boxcars in Rail North America.

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Our rail customers primarily operate in the petroleum, chemical, food/agriculture and transportation industries. Our worldwide railcar fleet consists of diverse railcar types that our customers use to ship approximately 600 different commodities. The following table presents an overview of our railcar types as well as the industries of our customers and the commodities they ship.

RAIL NORTH AMERICA

Rail North America is comprised of our wholly owned operations in the United States, Canada, and Mexico, as well as an affiliate investment. Rail North America primarily provides railcars pursuant to full-service leases under which it maintains the railcars, pays ad valorem taxes and property insurance, and provides administrative and other ancillary services. These railcars have estimated useful economic lives of 27 to 42 years and an average age of approximately 20 years. Rail North America has a large and diverse customer base, serving approximately 800 customers. In 2015, no single customer accounted for more than 6% of Rail North America’s total lease revenue, and the top ten customers combined accounted for approximately 24% of Rail North America’s total lease revenue. Rail North America leases railcars for terms that generally range from four to ten years, although leases may be for longer or shorter terms depending on market conditions. The average remaining lease term of the North American fleet was approximately four years as of December 31, 2015. Rail North America’s primary competitors are Union Tank Car Company, American Railcar Leasing, Trinity Industries Leasing Company, the CIT Group, Wells Fargo Rail, The Andersons, Inc., and SMBC Rail Services, LLC. Rail North America competes on the basis of customer relationships, lease rate, maintenance capabilities, customer service, engineering expertise, and availability of railcars.

Rail North America purchases new railcars from a number of manufacturers, including Trinity Industries, National Steel Car Ltd., The Greenbrier Companies, Freightcar America, and American Railcar Industries, Inc. We also acquire railcars in the secondary market.

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During 2014, we acquired more than 18,500 boxcars from General Electric Railcar Services Corporation for approximately $340 million (the "Boxcar Fleet"). In 2011, we entered into an agreement to acquire 12,500 newly built railcars from Trinity Rail Group, LLC ("Trinity"), a subsidiary of Trinity Industries, over a five-year period. As of December 31, 2015, we have received customer commitments to lease 12,400 railcars from this agreement, of which 10,100 have been delivered. In 2014, we entered into a new long-term supply agreement with Trinity that will take effect in mid-2016, upon the scheduled expiration of the 2011 supply agreement. Under the terms of that agreement, we may order up to 8,950 newly built railcars over a four-year period from March, 2016 through March, 2020. We may order either tank or freight cars; however, we expect that the majority of the order will be for tank cars. In January 2017, as part of the agreement, either party may initiate a review of the contract pricing if it no longer reflects market rates. This review could result in modifications to the agreement, including termination.

Rail North America also owns a fleet of locomotives, consisting of 611 older four-axle and 26 six-axle locomotives as of December 31, 2015. Locomotive customers are primarily Class I, regional, and short-line railroads and industrial users. Lease terms vary from month-to-month to 15 years. As of December 31, 2015, the average remaining lease term of the locomotive fleet was approximately seven years. Rail North America's primary competitors in locomotive leasing are Wells Fargo Rail, CIT Group Inc., and Progress Rail Services Corporation. Competitive factors in the market include equipment condition, availability, customer service, and pricing.

Rail North America also remarkets rail assets, including assets managed for third parties and an affiliate. Remarketing activities generate fees and gains which may contribute significantly to Rail North America’s segment profit.

Maintenance

Rail North America operates an extensive network of maintenance facilities in the United States and Canada dedicated to performing timely, efficient, and high quality maintenance for customers. Services include interior cleaning of railcars, routine maintenance and general repairs to the car body and safety appliances, regulatory compliance work, wheelset replacements, exterior blast and painting, and car stenciling. To the extent possible, railcar maintenance is scheduled in a manner that minimizes the amount of time the car is out of service. Rail North America’s maintenance network consists of:

• Six major maintenance facilities that can complete all types of maintenance services.

• Five field maintenance facilities that primarily focus on routine cleaning, repair, and regulatory compliance services.

• Six customer-dedicated sites operating solely within specific customer facilities that offer services tailored to the needs of our customers’ fleets.

• Twenty mobile unit locations that travel to many track-side field locations to provide spot repairs and interior cleaning services, thus avoiding the need to send a railcar to a major maintenance facility.

The maintenance network is supplemented by a number of preferred third-party maintenance facilities. In certain cases, we have entered into fixed-capacity contracts with these third parties under which Rail North America has secured access to maintenance capacity. In 2015, third-party maintenance facilities accounted for approximately 45% of Rail North America’s maintenance costs (excluding the cost of repairs performed by railroads).

In 2015, wholly owned and third-party maintenance facilities performed approximately 79,000 service events, including multiple independent service events for the same car.

Our maintenance activities are substantially dedicated to servicing our wholly owned railcar fleet pursuant to the provisions of our lease contracts. Additionally, our customers periodically require services that are not included in the full-service lease agreement, such as repair of railcar damage and, as noted below, we provide maintenance services to one of our affiliates. Revenue earned from these types of maintenance services is recorded in other revenue.

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Affiliates

Adler Funding LLC ("Adler") is a 12.5% owned railcar leasing partnership that was formed in 2010 with UniCredit Bank AG, Sperber Rail Holdings Inc., and LBT Holding Corporation. Rail North America provides lease, maintenance and asset remarketing services to Adler, for which it receives a base service fee and a performance-based asset remarketing fee. As of December 31, 2015, Adler owned approximately 2,400 railcars in North America consisting primarily of freight cars with an average age of approximately twelve years.

Southern Capital Corporation LLC (“SCC”) was a 50% owned joint venture with the Kansas City Southern Railroad, formed in 1996. During 2014 and 2015, SCC sold substantially all of its remaining railcars and locomotives.

RAIL INTERNATIONAL

Rail International is comprised of our wholly owned European operations ("GATX Rail Europe" or "GRE") and a wholly owned railcar leasing business in India ("Rail India"), as well as one development stage affiliate in China. GRE leases railcars to customers throughout Europe pursuant to full-service leases under which it maintains the railcars and provides value-adding services according to customer requirements. These railcars have estimated useful lives of 35 to 40 years and an average age of approximately 18 years. GRE has a diverse customer base with approximately 250 customers. In 2015, two customers each accounted for more than 10% of GRE's total lease revenue and the top ten customers combined accounted for approximately 65% of GRE's total lease revenue. GRE's lease terms generally range from one to ten years and as of December 31, 2015, the average remaining lease term of the European fleet was approximately two years. GRE competes principally on the basis of customer relationships, lease rate, maintenance expertise, and availability of railcars. Its primary competitors are VTG Aktiengesellschaft, the Ermewa Group, Nacco, a subsidiary of CIT Group Inc, Wascosa AG, and On Rail.

GRE acquires new railcars primarily from Astra Rail Industries S.R.L., Legios Loco a.s., and Feldbinder Spezialfahrzeugwerke GmbH. Additionally, GRE's Ostróda, Poland maintenance facility assembles several hundred tank cars each year. As of December 31, 2015, GRE has a firm commitment to acquire approximately 300 newly manufactured railcars to be delivered in 2016.

Rail India began operations in 2012 as the first company registered to lease railcars under the Indian Railways Wagon Leasing Scheme. In 2015, Rail India focused on pursuing investment opportunities in new and existing flat wagons, and developing relationships with customers, suppliers and the Indian Railways. As of December 31, 2015 Rail India owned 777 railcars with estimated useful lives of 20-25 years. Rail India's lease terms, all of which are net leases, generally range from two to ten years and as of December 31, 2015, the average remaining lease term of the Indian fleet was approximately five years. In 2016, Rail India expects to continue to pursue investment opportunities and grow its fleet of wagons.

Maintenance

GRE operates maintenance facilities in Hannover, Germany and Ostróda, Poland that perform significant repairs, regulatory compliance and modernization work for owned railcars. These service centers are supplemented by a number of third-party repair facilities, which in 2015 accounted for approximately 43% of GRE's fleet repair costs.

Similar to our Rail North America segment, Rail International's customers periodically require maintenance services that are not included in the full-service lease agreement. For GRE, these services are generally related to the repair of damages by customers and railways. Revenue earned from these maintenance activities is recorded in other revenue.

In India, all railcar maintenance is performed by the Indian Railways or an authorized third party provider.

Rail International Affiliates

In 2012, IMC-GATX Financial Leasing (Shanghai) Co., Ltd. (“IMC-GATX China”) was established as a 50% owned China-based joint venture between us and IMC Pan Asia Alliance Group (“IMC”). IMC is a well-established shipping enterprise with experience operating in China and was also our partner in a marine joint venture until we sold our interest in 2015. The primary objective of IMC-GATX China is to establish a rail leasing business in China, if that market develops.

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We previously owned a 37.5% interest in Ahaus Alstätter Eisenbahn Cargo AG (“AAE”), a Switzerland-based freight railcar leasing affiliate. During 2013, we sold our interest to our partner, Ahaus Alstätter Eisenbahn Holding AG.

ASC

ASC operates the largest fleet of US-flagged vessels on the Great Lakes and strives to attain the highest levels of delivery efficiency, safety and environmental stewardship. ASC provides waterborne transportation of dry bulk commodities such as iron ore, coal, limestone aggregates, and metallurgical limestone, which serve end markets that include steel making, domestic automobile manufacturing, electricity generation, and non-residential construction.Customer service, primarily in the form of scheduling flexibility, reliability, and operating safety, is key to ASC’s success. ASC’s sailing season generally runs from April 1 through December 31; however, depending on customer demand and weather conditions, certain vessels may commence operations during March and continue to operate into January of the following year.

At December 31, 2015, ASC’s fleet consisted of 17 vessels with a net book value of $236.5 million and $6.8 million of off-balance sheet assets. All ships are environmentally and operationally compliant. Fourteen of the vessels are diesel powered, have an average age of 38 years, and estimated useful lives of 65 years. Two steam powered vessels were built in the 1940s and 1950s and have estimated remaining useful lives of four years. The other vessel in ASC's fleet is a diesel-powered articulated tug-barge built in 2012, which is leased by ASC under an operating lease that expires in 2017. Sixteen of ASC’s vessels are generally available for both service contract and spot business; the remaining vessel is dedicated to a time charter agreement that is scheduled to expire following the 2018 sailing season. ASC’s vessels operate exclusively in the fresh water of the Great Lakes and as a result, with proper maintenance and periodic refurbishment, may achieve extended service well beyond the useful life estimates.

All of ASC’s vessels are equipped with self-unloading equipment, enabling them to discharge dry bulk cargo without assistance from shore-side equipment or personnel. This equipment enables the vessels to operate twenty-four hours a day, seven days a week. ASC’s vessels are capable of transporting and unloading almost any free flowing, dry bulk commodity. In 2015, ASC served 26 customers with the top five customers comprising 85% of total revenue.

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The following table sets forth ASC's fleet as of December 31, 2015:

Great Lakes Vessels	Length (feet)	Capacity (gross tons)
M/V American Spirit	1004'	62,400
M/V Burns Harbor	1000'	80,900
M/V Indiana Harbor	1000'	80,900
M/V Walter J. McCarthy, Jr	1000'	80,900
M/V American Century	1000'	78,850
M/V American Integrity	1000'	78,850
M/V St. Clair	770'	44,800
M/V American Mariner	730'	37,300
M/V H. Lee White	704'	35,400
M/V John J. Boland	680'	34,000
M/V Adam E. Cornelius	680'	29,200
M/V Buffalo	634'-10"	24,300
M/V Sam Laud	634'-10"	24,300
M/V American Courage	634'-10"	23,800
Str. American Victory	730'	26,300
Str. American Valor	767'	25,500
Ken Boothe and Lakes Contender (articulated tug-barge)	740'	34,000

ASC’s vessels operate pursuant to customer contracts that stipulate freight volume and may also be supplemented with additional spot volume opportunities. In 2015, ASC operated 13 vessels and carried 26.5 million net tons of cargo. The number of vessels deployed by ASC in any given year is dependent on customer volume requirements.

ASC’s primary competitors on the Great Lakes are Interlake Steamship Company, Great Lakes Fleet, Inc., Grand River Navigation, Central Marine Logistics, and VanEnkevort Tug and Barge. ASC principally competes on the basis of service capabilities, customer relationships, and price.

The United States shipping industry is subject to the Jones Act, which requires all commercial vessels transporting goods between US ports to be built, owned, operated and manned by US citizens, and registered under the US flag.

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PORTFOLIO MANAGEMENT

Portfolio Management has historically generated leasing, marine operating, asset remarketing, and management fee income through a collection of diversified wholly owned assets and joint venture investments. In addition, Portfolio Management's segment profit is significantly impacted by the contribution of the Rolls-Royce & Partners Finance companies. In 2015, we made the decision to exit the majority of our marine investments within our Portfolio Management segment, including six chemical parcel tankers, a number of inland marine vessels, and our 50% interest in the Cardinal Marine joint venture. Certain marine investments were sold during 2015, and additional sales are expected to be completed in 2016. See the Portfolio Management section in Part II, Item 7 of this Form 10-K for further details. Management believes that selling these investments at this time will provide favorable returns and eliminate the future risk of continuing to hold these investments in markets that have become more volatile. Subsequent to the sales of these marine investments, segment profit will be driven primarily by the Rolls-Royce & Partners Finance entities and, to a lesser extent, by certain retained marine investments.

The following table sets forth the approximate net book value of Portfolio Management’s assets as of December 31 (in millions):

	Owned Assets		Affiliate Investments		Managed Assets
2015	$	301.4	$	335.1	$	71.0
2014	474.6		338.7		64.1
2013	536.0		320.9		125.3

Owned and Managed Assets

Portfolio Management's wholly owned portfolio consists of assets subject to operating and finance leases, marine assets operating in pooling arrangements, and secured loans. As of December 31, 2015, $103.4 million of the owned assets were held for sale. Upon completion of the sales of the marine investments described above, Portfolio Management's remaining owned assets will consist primarily of five liquefied gas carrying vessels.

Portfolio Management also manages portfolios of assets for third parties which generate fee and residual sharing income through portfolio administration and remarketing of these assets.

Affiliates

Portfolio Management has historically held investments in affiliated companies, primarily aircraft spare engine leasing and shipping operations.

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The Rolls-Royce & Partners Finance companies (collectively the “RRPF affiliates”) are a collection of fifteen 50% owned domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. The RRPF affiliates are primarily engaged in two business activities: lease financing of aircraft spare engines to a diverse group of commercial aircraft operators worldwide and sale-leaseback financing of aircraft spare engines to Rolls-Royce for use in their engine maintenance programs. As of December 31, 2015, the RRPF affiliates, in aggregate, owned 436 engines, of which 224 were on lease to Rolls-Royce. Aircraft engines are generally depreciated over a useful life of 25 years when new and, depending on actual hours of usage and with proper maintenance, may achieve extended service well beyond the useful life estimates. As of December 31, 2015, the average age of these engines was approximately 11 years. Lease terms vary but typically range from 7 to 10 years. Rolls-Royce acts as manager for each of the RRPF affiliates and also performs substantially all required maintenance activities.

Cardinal Marine Investments LLC (“Cardinal Marine”) was a 50% owned marine joint venture with IMC Holdings, a subsidiary of IMC. IMC is a leading Asia-focused integrated maritime and industrial solutions provider with diversified interests in dry and liquid bulk shipping, ship and crew management, offshore and marine engineering, oil and gas assets, and services and logistics. Cardinal Marine owns five chemical parcel tankers (each with 45,000 dead weight tons (“dwt”) carrying capacity) that operate under a pooling arrangement with IMC's other chemical tankers in support of the movement of liquid bulk chemicals in the Middle East Gulf/Far East and US Gulf/Far East trades. In 2015, we sold our interest in this joint venture to our partner, IMC Holdings.

Intermodal Investment Funds V and VII were each 50% owned joint ventures with DVB Bank SE. The affiliates were formed to finance shipping containers, which were on direct finance leases to third parties. In 2014, we sold our investments in these joint ventures.

Somargas II Private Limited (“Somargas”) and Singco Gas Pte, Limited (“Singco”) were 35% and 50% owned joint ventures with IM Skaugen ASA (“Skaugen”). Somargas owned six liquid petroleum gas/ethylene vessels (each with 8,500 - 10,000 cubic meters (“cbm”) carrying capacity) and Singco owned four liquid petroleum gas/ethylene/LNG vessels (each with 10,000 cbm carrying capacity). In 2013, we sold our interests in Singco and Somargas to Skaugen. In connection with the sale, we received five of the vessels. The vessels continue to operate under a pooling arrangement with Skaugen.

TRADEMARKS, PATENTS AND RESEARCH ACTIVITIES

Patents, trademarks, licenses and research and development activities are not material to our businesses taken as a whole.

SEASONAL NATURE OF BUSINESS

ASC’s fleet is inactive for a significant portion of the first quarter of each year due to the winter conditions on the Great Lakes.

CUSTOMER BASE

GATX, taken as a whole, is not dependent upon a single customer nor does it have any significant customer concentrations. Segment concentrations, if material, are described above.

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EMPLOYEES AND EMPLOYEE RELATIONS

As of December 31, 2015, we employed 2,253 persons, of whom approximately 42% were union workers covered by collective bargaining agreements.

See "Note 15. Concentrations" in Part II, Item 8 of this Form 10-K for additional information about our employees and concentration of labor force.

ENVIRONMENTAL MATTERS

Our operations, facilities and properties are subject to extensive federal, state, local, and foreign environmental laws and regulations. These laws cover discharges to waters; air emissions; toxic substances; the generation, handling, storage, transportation, and disposal of waste and hazardous materials; and the investigation and remediation of contamination. These laws have the effect of increasing the cost and liability associated with leasing and operating assets, and violations can result in significant fines, penalties, or other liabilities. Environmental risks and compliance with applicable environmental laws and regulations are inherent in rail operations, which frequently involve transporting chemicals and other hazardous materials.

We are subject to, and may from time to time continue to be subject to, environmental cleanup and enforcement actions in the US and in the foreign countries in which we operate. In particular, the federal Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), also known as the Superfund law, generally imposes joint and several liability for investigation, cleanup and enforcement costs on current and former owners and operators of a site, without regard to fault or the legality of the original conduct. Accordingly, we have been and may, in the future, be named as a potentially responsible party under CERCLA and other federal, state, local, and foreign laws or regulations for all or a portion of the costs to investigate and clean up sites at which certain contaminants may have been discharged or released by us, our current lessees, former owners or lessees of properties, or other third parties. Environmental remediation and other environmental costs are accrued when considered probable and amounts can be reasonably estimated. As of December 31, 2015, environmental costs were not material to our financial position, results of operations or cash flows. For further discussion, see "Note 24. Legal Proceedings and Other Contingencies" in Part II, Item 8 of this Form 10-K.

EXECUTIVE OFFICERS OF THE REGISTRANT

The following information regarding our executive officers is included in Part I in lieu of inclusion in our definitive Proxy Statement:

Name	Offices Held	Position Held Since	Age
Brian A. Kenney	Chairman, President and Chief Executive Officer	2005	56
Robert C. Lyons	Executive Vice President and Chief Financial Officer	2012	52
James F. Earl	Executive Vice President and President, Rail International	2012	59
Thomas A. Ellman	Executive Vice President and President, Rail North America	2013	47
Deborah A. Golden	Executive Vice President, General Counsel and Corporate Secretary	2012	61
Niyi A. Adedoyin	Senior Vice President and Chief Information Officer	2016	48
Michael T. Brooks	Senior Vice President, Operations and Technology	2013	46
James M. Conniff	Senior Vice President, Human Resources	2014	58
Curt F. Glenn	Senior Vice President, Portfolio Management	2007	61
William M. Muckian	Senior Vice President, Controller and Chief Accounting Officer	2007	56
Paul F. Titterton	Senior Vice President and Chief Commercial Officer	2015	40
Eric D. Harkness	Vice President, Treasurer and Chief Risk Officer	2012	43
Jeffery R. Young	Vice President and Chief Tax Officer	2015	53

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• Mr. Kenney has served as Chairman, President and Chief Executive Officer since 2005. Previously, Mr. Kenney served as President from 2004 to 2005, Senior Vice President, Finance and Chief Financial Officer from 2002 to 2004, Vice President, Finance and Chief Financial Officer from 1999 to 2002, Vice President, Finance from 1998 to 1999, Vice President and Treasurer from 1997 to 1998, and Treasurer from 1995 to 1996.

• Mr. Lyons has served as Executive Vice President and Chief Financial Officer since June 2012. Previously, Mr. Lyons served as Senior Vice President and Chief Financial Officer from 2007 to June 2012, Vice President and Chief Financial Officer from 2004 to 2007, Vice President, Investor Relations from 2000 to 2004, Project Manager, Corporate Finance from 1998 to 2000, and Director of Investor Relations from 1996 to 1998.

• Mr. Earl has served as Executive Vice President and President, Rail International since June 2012. In addition, Mr. Earl has served as the Chief Executive Officer of American Steamship Company since June 2012. Previously, Mr. Earl served as Executive Vice President and Chief Operating Officer from 2006 to June 2012, Executive Vice President — Rail from 2004 to 2006, Executive Vice President — Commercial at Rail from 2001 to 2004 and in a variety of increasingly responsible positions in the GATX Capital Rail Group from 1988 to 2001.

• Mr. Ellman has served as Executive Vice President and President, Rail North America since June 2013. Previously, Mr. Ellman served as Senior Vice President and Chief Commercial Officer from November 2011 to June 2013, Vice President and Chief Commercial Officer from 2006 to November 2011. Prior to re-joining GATX in 2006, Mr. Ellman served as Senior Vice President and Chief Risk Officer and Senior Vice President, Asset Management of GE Equipment Services, Railcar Services and held various positions at GATX in the GATX Rail Finance Group.

• Ms. Golden has served as Executive Vice President, General Counsel and Corporate Secretary since June 2012. Previously, Ms. Golden served as Senior Vice President, General Counsel and Corporate Secretary from 2007 to June 2012. Ms. Golden joined GATX in 2006 as Vice President, General Counsel and Corporate Secretary. Prior to joining GATX, Ms. Golden served as Vice President and General Counsel of Midwest Generation, LLC from 2004 to 2005, Deputy General Counsel, State of Illinois, Office of the Governor from 2003 to 2004 and Assistant General Counsel with Ameritech Corporation/SBC Communications, Inc. from 1997 to 2001.

• Mr. Adedoyin was elected Senior Vice President and Chief Information Officer in January 2016. Previously, Mr. Adedoyin served as Vice President and Chief Information Officer from 2013 to 2016 and Senior Director, IT Strategy and Project Management Office from 2008 to 2013.

• Mr. Brooks has served as Senior Vice President, Operations and Technology since June 2013. Previously, Mr. Brooks served as Senior Vice President and Chief Information Officer from November 2008 to June 2013. Prior to joining GATX, Mr. Brooks served as Chief Information Officer and Vice President of the retail division of Constellation Energy and held various consulting roles of increasing responsibility with Accenture and Oracle Corporation.

• Mr. Conniff has served as Senior Vice President, Human Resources since December 2014. Previously, Mr. Conniff served as Vice President, Human Resources since 2014 and Senior Director, Benefits and Employee Services since 2008. Mr. Conniff joined GATX in 1981 and has held a variety of positions in finance and human resources.

• Mr. Glenn has served as Senior Vice President, Portfolio Management since 2007. Previously, Mr. Glenn served as Vice President, Portfolio Management from 2006 to 2007 and as a GATX Corporation Vice President since 2004 and Executive Vice President of Portfolio Management since 2003. Prior to that, Mr. Glenn served as Senior Vice President and Chief Financial Officer of the GATX Capital Division of GATX Financial Corporation from 2000 to 2003 and in a variety of increasingly responsible positions at GATX Capital from 1980 to 2000.

• Mr. Muckian has served as Senior Vice President, Controller and Chief Accounting Officer since 2007. Previously, Mr. Muckian served as Vice President, Controller and Chief Accounting Officer from 2002 to 2007, Controller and Chief Accounting Officer from 2000 to 2002, and Director of Taxes of GATX from 1994 to 2000.

• Mr. Titterton was elected Senior Vice President and Chief Commercial Officer in April 2015. Previously, Mr. Titterton served as Vice President and Chief Commercial Officer from June 2013 to April 2015, Vice President and Group Executive, Fleet Management,

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Marketing and Government Affairs from December 2011 to June 2013, Vice President and Executive Director, Fleet Management from 2008 to 2011, and in a variety of increasingly responsible positions since joining the company in 1997.

• Mr. Harkness has served as Vice President, Treasurer and Chief Risk Officer since October 2012. Previously, Mr. Harkness served as Vice President, Chief Risk Officer from September 2010 to October 2012 and Senior Investment Risk Officer from 2007 to September 2010. Prior to joining GATX, Mr. Harkness served in a variety of positions of increasing responsibility in the financial services industry.

• Mr. Young was elected Vice President and Chief Tax Officer in January 2015. Previously, Mr. Young served as Vice President of Tax from 2007 to January 2015 and as Director of Tax from 2003 to 2007. Prior to joining GATX, Mr. Young spent twenty years in a variety of tax related positions in public accounting and the financial services industry.

AVAILABLE INFORMATION

We make available free of charge at our website, www.gatx.com, our most recent annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and any amendments to those reports filed or furnished pursuant to the Securities Exchange Act of 1934, as amended (the "1934 Act"), as soon as reasonably practicable after such reports are electronically filed with, or furnished to, the US Securities and Exchange Commission (“SEC”). Charters for the Audit Committee, Compensation Committee and Governance Committee of the Board of Directors, the Corporate Governance Guidelines, the Code of Business Conduct and Ethics and the Code of Ethics for Senior Company Officers are posted under Corporate Governance in the Investor Relations section of our website, and are available in print upon request by any shareholder. Within the time period prescribed by SEC and New York Stock Exchange regulations, we will post on our website any amendment to the Code of Ethics for Senior Company Officers and the Code of Business Conduct and Ethics or any waivers thereof. The information on our website is not incorporated by reference into this report.

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Item 1A.  Risk Factors

Investors should consider the risk factors described below as well as other information contained in this filing or our other filings with the US Securities and Exchange Commission before investing in our securities. If any of the events described in the risk factors below occur, our business, financial condition and results of operations could be adversely affected.

We may be unable to maintain assets on lease at satisfactory rates due to decreases in customer demand, oversupply of railcars in the market, or other changes in supply and demand.

Our profitability depends on our ability to lease assets at satisfactory rates and to re-lease assets upon lease expiration. Circumstances such as excess capacity in particular railcar types or generally in the marketplace, decreases in customer demand for our railcars, economic downturns, changes in customer behavior, or other changes in supply or demand can adversely affect asset utilization rates and lease rates. Economic uncertainty or a decline in customer demand for our assets could cause customers to request shorter lease terms and lower lease rates, which may result in a decrease in our asset utilization rate and reduced revenues. Alternatively, customers may seek to lock-in relatively low lease rates for longer terms, which may result in an adverse impact on current or future revenues.

Weak economic conditions in the US or other parts of the world and other factors may decrease customer demand for our assets and services and negatively impact our business and results of operations.

We rely on continued demand from our customers to lease our railcars and locomotives. Demand for these assets and services depends on the markets for our customers’ products and services and the strength and growth of their businesses. Some of our customers operate in cyclical markets, such as the steel, energy, chemical, and construction industries, which are susceptible to macroeconomic downturns and may experience significant changes in demand over time. Weakness in certain sectors of the economy in the United States and other parts of the world may make it more difficult for us to lease certain types of railcars that are either returned at the end of a lease term or returned as a result of a customer bankruptcy or default.

Additional factors, such as changes in harvest or production volumes, changes in supply chains, choices in types of transportation assets, availability of substitutes and other operational needs may also influence customer demand for our assets. Demand for our marine assets and shipping services also depends on the factors discussed above. Significant declines in customer demand for our assets and services could adversely affect our financial performance.

In many cases, demand for our assets also depends on our customers’ desire to lease, rather than buy, the assets. Tax and accounting considerations, interest rates, and operational flexibility, among other factors, may influence a customer’s decision to lease or buy assets. We have no control over these external considerations, and changes in these factors, including anticipated changes to lease accounting rules, could negatively impact demand for our assets held for lease.

Adverse changes in the price of, or demand for, crude oil or other commodities could reduce demand for our railcars and have a negative impact on our results of operations.

Adverse changes in commodity prices or reduced demand for commodities could reduce customer demand for various types of railcars in our fleet. A significant decrease in the price of a commodity may cause producers of that commodity to cut their production levels. A significant increase in the price of a commodity could cause our customers to switch to less expensive alternatives that are not delivered by rail. In each case, these changes in customer behavior can reduce demand for the portions of our fleet that are used to transport the commodity.

Demand for railcars that are used to transport crude oil and related products, including commodities used in drilling operations and the commodities produced by such operations, is dependent on the demand for these commodities. While only about 1.7% of our worldwide fleet is engaged in direct crude-by-rail service, approximately 21% of our North American fleet is leased to petroleum-related customers, making them an important source of our worldwide revenue. Sustained low oil prices could cause oil producers to curtail the drilling of new wells or cease production at certain existing wells that are uneconomical to operate at current crude price levels. Reduced oil drilling activity could result in decreased demand for our railcars used to transport the commodities used in drilling operations, such as frac sand and fracking chemicals, and the commodities produced by such operations, including crude oil and refined products such as gasoline, diesel fuel, petrochemicals and liquefied petroleum gas. A significant and sustained decrease in the price of crude oil and related products could reduce customer demand for our railcars and negatively impact revenue and our results of operations.

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Demand for railcars that are used to transport ethanol and other renewable fuels may be affected by government subsidies and mandates, which may be enacted, changed, or eliminated from time to time. It is possible that the reduction or elimination of current US mandates for ethanol blending in motor fuels could reduce the production of ethanol, which would reduce demand for portions of our tank car fleet and negatively impact our revenue and profitability.

Events that negatively affect certain assets, customers, or geographic regions could have a negative impact on our results of operations.

We generally derive our revenues from a variety of asset types, customers, industries, and geographic locations. However, from time to time we could have a large investment in a particular asset type, a large revenue stream associated with a particular customer or industry, or a large number of customers located in a particular geographic region. Decreased demand from a discrete event impacting a specific asset type, customer, or industry, or region in which we have a concentrated exposure could negatively impact our results of operations.

A significant decrease in lease renewals by our customers or a significant increase in the number of tank cars requiring compliance-based maintenance could negatively impact operations and substantially increase our costs.

Decreases in customer demand for our railcars could increase the number of leases that are not renewed upon expiration and could cause some customers to default, resulting in the early return of railcars. Railcars that are returned by our customers often must undergo maintenance and service work before being leased to new customers. A significant increase in the number of railcars requiring maintenance may negatively affect our operations and substantially increase maintenance and other related costs. In addition, low demand for certain types of railcars in our fleet may make those railcars more difficult to lease to new customers if they are returned at the end of their existing leases or following a customer default, which could negatively affect our results of operations.

We also perform a variety of government or industry-mandated maintenance programs on our full-service tank cars based on their service time. These compliance programs are cyclical in nature, and as a result, we can face significant increases in the volume of tank cars requiring extensive maintenance in any given year. A significant increase in the number of tank cars requiring maintenance may negatively impact our operations and substantially increase maintenance and other related costs. In addition, while we have contracted with third party maintenance providers to assist with these compliance procedures to the extent our demand exceeds our owned maintenance capacity, high demand faced by these providers from other tank car owners may constrain our access to the providers or may substantially increase our costs.

Our long-term railcar purchase commitments could subject us to material operational and financial risks.

Unlike some of our competitors in the railcar leasing market, we do not manufacture railcars. In order to obtain committed access to a supply of newly built railcars on competitive terms, we regularly enter into long-term supply agreements with manufacturers to purchase significant numbers of newly built railcars over a multi-year period. Some of these agreements may provide for flexibility in the pricing, timing, and quantity of our purchasing commitments, while other agreements may provide no such flexibility. Therefore, if economic conditions weaken during the term of a long-term supply agreement, it is possible that we may be required to continue to accept delivery of, and pay for, new railcars at times when it may be difficult for us to lease such railcars and our financing costs may be high, which could negatively affect our revenues and profitability.

Soft market conditions and declines in asset values may reduce opportunities for us to generate remarketing income.

We utilize our extensive knowledge and experience to remarket rail assets in order to optimize the composition of our fleet, and these activities generate income that contributes significantly to Rail North America’s segment profit.  Reduced demand for our assets due to adverse market conditions could reduce opportunities for us to generate remarketing income.  A significant or prolonged decline in the secondary market for our assets could adversely affect our financial performance. 

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We have significant financial exposure related to the performance of our aircraft engine leasing affiliate investments.

GATX and Rolls-Royce plc (“Rolls Royce”) each own 50% of fifteen domestic and foreign joint venture entities (collectively, the “RRPF affiliates”) that own and lease aircraft engines to Rolls-Royce and owners and operators of commercial aircraft. These investments expose us to various risks associated with the commercial aviation industry, including geographic exposure and customer concentrations unique to that industry. The financial results of the RRPF affiliates depend heavily on the performance of Rolls-Royce, as Rolls-Royce is both a major customer of, and a critical supplier of maintenance services to, the RRPF affiliates. The RRPF affiliates contribute significantly to our profit. If the financial or operating performance of the RRPF affiliates deteriorates, our results of operations and cash flows could be negatively affected.

Fluctuations in foreign exchange rates and interest rates could negatively impact our results of operations.

Upon consolidation, we translate the financial results of certain subsidiaries from their local currency to the US dollar, which exposes us to foreign exchange rate fluctuations. As exchange rates vary, the translated operating results of foreign subsidiaries may differ materially from period to period. We also have gains and losses on foreign currency transactions, which could vary based on fluctuations in exchange rates and the timing of the transactions and their settlement. In addition, fluctuations in foreign exchange rates can affect the demand and price for services we provide both domestically and internationally, and could negatively impact our results of operations. We also face risks associated with fluctuations in interest rates. We may seek to limit our exposure to foreign exchange rate and interest rate risk with currency or interest rate derivatives, which may or may not be effective. A material and unexpected change in interest rates or foreign exchange rates could negatively affect our financial performance.

Many of our employees are represented by unions, and failure to successfully negotiate collective bargaining agreements may result in strikes, work stoppages, or substantially higher labor costs.

A significant portion of our employees are represented by labor unions and work under collective bargaining agreements that cover a range of workplace matters, such as wages, health and welfare benefits, and work rules. We have generally been successful in negotiating acceptable agreements with the unions without experiencing material work stoppages. However, if we fail to negotiate acceptable new agreements, our business could be disrupted by strikes or lockouts. We could also incur increased operating costs due to higher wages or benefits paid to union workers. Business disruptions or higher operating costs could both have an adverse effect on our financial position, results of operations, or cash flows.

Changes in railroad efficiency may adversely affect demand for our railcars.

Railroad infrastructure investments that improve efficiency or declines in rail traffic due to decreased demand could increase the average speed at which railroads can operate their trains, which may reduce the number of railcars needed for railroads to haul the same amount of cargo. Adverse weather conditions, railroad mergers, and increases in rail traffic could result in slower transit times making rail transportation less attractive to shippers versus other modes of transport. In each case, these changes could reduce demand for our railcars and negatively impact revenue and our results of operations.

New rules in the US and Canada applicable to tank cars carrying crude oil, ethanol, and other flammable liquids could negatively impact our tank car fleet in flammable liquids service.

Recently adopted legislation and regulations in the US and Canada established new design standards for tank cars used to transport various flammable liquids, including crude oil and ethanol. Existing tank cars in flammables service that were built prior to the adoption of the new design standards must be modified or removed from service between May, 2017, and May, 2029, depending on the type of car, the type of commodity carried, and whether the car is used in the US, Canada, or both countries. We have a fleet of approximately 125,000 railcars in North America, including approximately 13,900 tank cars currently used to transport flammable liquids that are affected by the new rules, of which approximately 4,300 are moving crude oil and ethanol. Over 90% of our affected tank cars have a compliance deadline of 2023 or later. We expect to modify some of the most modern of our affected cars tank cars to comply with the new standards. However, for the majority of the affected cars, we currently anticipate retiring, redeploying, or selling them rather than performing retrofits. The additional costs to modify certain tank cars and the cost of retiring tank cars early could have an adverse impact on our business and results of operations.

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Deterioration of conditions in the global capital markets or negative changes in our credit ratings may limit our ability to secure financing and may increase our borrowing costs.

We rely largely on banks and capital markets to fund our operations and contractual commitments, including the issuance of long-term debt instruments and commercial paper. These markets can experience high levels of volatility and access to capital can be limited for an extended period of time. In addition to conditions in the capital markets, changes in our financial performance or credit ratings or ratings outlook, as determined by rating agencies such as Standard & Poor’s and Moody’s Investors Service, could cause us to incur increased borrowing costs or to have greater difficulty accessing public and private markets for secured and unsecured debt. If we are unable to secure financing on acceptable terms, our other sources of funds, including available cash, bank facilities, cash flow from operations, and portfolio proceeds, may not be adequate to fund our operations and contractual commitments.

We may incur future asset impairment charges.

We review long-lived assets and joint venture investments for impairment regularly, or when circumstances indicate the carrying value of an asset or investment may not be recoverable. Among other circumstances, the following may change our estimates of the cash flows we expect our long-lived assets or joint venture investments will generate, which could require us to recognize asset impairment charges:

• A weak economic environment or challenging market conditions

• New laws, rules or regulations affecting our assets, or changes to existing laws, rules or regulations

• Events related to particular customers or asset types

• Asset or portfolio sale decisions by management

Competition could result in decreased profitability.

We operate in a highly competitive business environment. In certain cases, our competitors are larger than we are and have greater financial resources, higher credit ratings, and a lower cost of capital. These factors may enable our competitors to offer leases to customers at lower rates than we can provide, thus negatively impacting our profitability, asset utilization and investment volume.

Risks related to our international operations and expansion into new geographic markets could adversely affect our business, financial condition, and operating results.

We generate a significant amount of our net income outside the United States. In recent years, we have increased our focus on international rail growth and expansion into select emerging markets as a means to grow and diversify earnings. Our foreign operations and international expansion strategy are subject to the following risks associated with international operations:

• Noncompliance with US laws affecting operations outside of the United States, such as the Foreign Corrupt Practices Act

• Noncompliance with a variety of foreign laws and regulations

• Failure to properly implement changes in tax laws and the interpretation of those laws

• Failure to develop and maintain data management practices that comply with laws related to cybersecurity, privacy, data localization, and data protection

• Fluctuations in currency values

• Sudden changes in foreign currency exchange controls

• Discriminatory or conflicting fiscal policies

• Difficulties enforcing contractual rights or foreclosing to obtain the return of our assets in certain jurisdictions

• Uncollectible accounts and longer collection cycles that may be more prevalent in foreign countries

• Ineffective or delayed implementation of appropriate controls, policies, and processes across our diverse operations and employee base

• Imposition of sanctions against countries where we operate or specific companies or individuals with whom we do business

• Nationalization or confiscation of assets by foreign governments, and imposition of additional or new tariffs, quotas, trade barriers, and similar restrictions on our operations outside the United States

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We have been and may continue to be involved in various types of litigation.

The nature of our business and our assets potentially exposes us to significant personal injury and property damage claims and litigation, environmental claims, or other types of lawsuits inside and outside the US. Customers may use certain types of our railcars to transport crude oil and other hazardous materials, and an accident involving a railcar carrying such materials could lead to litigation and subject us to significant liability, particularly where the accident involves serious personal injuries or the loss of life. Our failure to maintain railcars in compliance with governmental regulations and industry rules could also expose us to fines and claims for personal injury, property damage, and environmental damage. In some jurisdictions, an accident can give rise to both civil and criminal liabilities for us and, in some cases, our employees. In the event of an unfavorable outcome, we could be subject to substantial damages, including criminal penalties and fines, and our employees who are named as criminal defendants in any such litigation may be subject to incarceration and fines. A substantial adverse judgment against us could have a material effect on our financial position, results of operations, cash flows, and reputation.

Our rail and marine assets and operations are subject to various laws, rules, and regulations. If these laws rules, and regulations change or we fail to comply with them, it could have a significant negative effect on our business and profitability.

Our rail and marine operations are subject to various laws, rules, and regulations administered by authorities in jurisdictions where we do business. In North America, our railcar and locomotive fleet and operations are subject to safety, operations, maintenance, and mechanical standards, rules, and regulations enforced by various federal and state agencies and industry organizations, including the US Department of Transportation, the Federal Railroad Administration, the Pipeline and Hazardous Materials Safety Administration of the US Department of Transportation, Transport Canada, and the Association of American Railroads. State and provincial agencies regulate some health and safety matters related to rail operations not otherwise preempted by federal law. Our business and railcar and locomotive fleet may be adversely impacted by new rules or regulations, or changes to existing rules or regulations, which could require additional maintenance or substantial modification or refurbishment of our railcars, or could make certain types of railcars inoperable or obsolete or require them to be phased out prior to the end of their useful lives. In addition, violations of these rules and regulations can result in substantial fines and penalties, including potential limitations on operations or forfeitures of assets.

Similarly, our marine assets and operations are subject to rules and regulations relating to safety, US citizen ownership requirements, emissions, ballast discharges, and other environmental and operational matters enforced by various federal and state agencies, including the Maritime Administration of the US Department of Transportation, the US Coast Guard, and the US Environmental Protection Agency. If we fail to comply with these rules and regulations, we could be prohibited from operating or leasing marine assets in the US market, and under certain circumstances, could incur severe fines and penalties, including potential limitations on operations or forfeitures of assets.

In addition, our foreign operations are subject to the jurisdiction of authorities in countries where we do business. If we fail to comply with these laws, rules, and regulations, or if they change in the future, the use of our assets could be restricted, or the economic value of our assets may be reduced. These restrictions or reductions could lead to loss of revenue or cause us to incur significant expenses to comply with laws, rules, and regulations, thereby increasing operating expenses. Certain changes to or actions by authorities under existing laws, rules, and regulations, or actions, could result in the obsolescence of various assets or impose compliance costs that are significant enough to render those assets economically obsolete.

We may not be able to obtain cost-effective insurance.

We manage our exposure to risk, in part, by purchasing insurance. There is no guarantee that cost-effective insurance will consistently be available. If insurance coverage becomes prohibitively expensive, we could be forced to reduce our coverage amount and increase the amount of self-insured risk we retain, thereby increasing our exposure to uninsured adverse judgments and other losses and liabilities that could have a material effect on our financial position, results of operations and cash flows.

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We are subject to extensive environmental regulations and the costs of remediation may be material.

We are subject to extensive federal, foreign, state, and local environmental laws and regulations concerning, among other things, the discharge of hazardous materials and remediation of contaminated sites. In addition, some of our properties, including those previously owned or leased, have been used for industrial purposes, which may have resulted in discharges onto these properties. Environmental liability can extend to previously owned or operated properties in addition to properties we currently own or use. Additionally, we could incur substantial costs, including cleanup costs, fines and costs arising out of third-party claims for property or natural resource damage and personal injury as a result of violations of or liabilities under environmental laws and regulations in connection with our or our lessees’ current or historical operations. Under some environmental laws in the United States and certain other countries, the owner of a leased railcar may be liable for environmental damage, cleanup or other costs in the event of a spill or discharge of material from a railcar without regard to the owner's fault. We routinely assess environmental liabilities, including our potential obligations and commitments for remediation of contaminated sites and the possible amount of recoveries from other responsible parties. Due to the regulatory complexities, risk of unidentified contaminants on our properties and the potential liability for the operations of our lessees, it is possible environmental and remediation costs may be materially different from the costs we have estimated.

The fair market value of our long-lived assets may differ from the value of those assets reflected in our financial statements.

Our assets primarily consist of long-lived assets such as railcars, marine vessels, and other equipment. The carrying value of these assets in our financial statements may sometimes differ from their fair market value. These valuation differences may be positive or negative and could be material based on market conditions and demand for certain assets.

Our assets may become obsolete.

In addition to changes in laws, rules, and regulations that may make assets obsolete, changes in the preferred method our customers use to ship their products, changes in demand for particular products, or a shift by customers toward purchasing assets rather than leasing them may adversely impact us. Our customers' industries are driven by dynamic market forces and trends, which are influenced by economic and political factors. Changes in our customers' markets may significantly affect demand for our rail and marine assets. A reduction in customer demand or change in customers' preferred method of product transportation could result in the economic obsolescence of the assets leased by those customers.

Unfavorable conditions on the Great Lakes could impact business operations, which could result in increases in costs and decreases in revenues.

The success of our ASC subsidiary depends on the efficiency of its operations on the Great Lakes. Disruptions at the Sault St. Marie locks or severe weather conditions, such as high wind and ice formation, could cause significant business interruptions or shortened sailing seasons. Additionally, low water levels and vessel draft restrictions may restrict the volume that ASC's vessels can transport per trip. These conditions could negatively impact our results of operations through increased operating costs or decreased revenues.

We are subject to the inherent risks of our affiliate investments.

We are indirectly exposed to risks through our ownership interests in affiliates, as our affiliates may experience many of the same risks discussed in this "Risk Factors" section. Rolls-Royce manages our RRPF affiliates, and we sometimes retain third parties to manage assets we own directly, such as our ocean-going vessels. Poor business or financial results of these affiliates, or the third parties who manage, operate, or invest along with us in these affiliates, could negatively impact our financial results. Additionally, when a third party manages or operates an affiliate or asset, we may not have control over operational matters related to the affiliate or asset, which could result in actions that have an adverse economic impact on the affiliate, the asset, or GATX or could expose GATX to potential liability.

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We may be affected by climate change or market or regulatory responses to climate change.

Changes in laws, rules, and regulations, or actions by authorities under existing laws, rules, or regulations, to address greenhouse gas emissions and climate change could negatively impact our customers and business. For example, restrictions on emissions could significantly increase costs for our customers whose production processes require significant amounts of energy. Customers' increased costs could reduce their demand to lease our assets. In addition, railcars in our fleet that are used to carry fossil fuels, such as coal and petroleum, could see reduced demand if new government regulations mandate a reduction in fossil fuel consumption. New government regulations could also increase our marine and other operating costs and compliance with those regulations could be costly. Potential consequences of laws, rules, or regulations addressing climate change could have an adverse effect on our financial position, results of operations, and cash flows.

A small number of shareholders could significantly influence our business.

Five shareholders collectively control more than 50% of our outstanding common stock. Accordingly, a small number of shareholders could affect matters that require shareholder approval, such as the election of directors and the approval of significant business transactions.

Changes to assumptions used to calculate post-retirement costs, increases in funding requirements, and investment losses in pension funds could adversely affect our results of operations.

We calculate our pension and other post-retirement costs using various assumptions, such as discount rates, long-term return on plan assets, salary increases, health care cost trend rates, and other factors. Changes to any of these assumptions could adversely affect our financial position and results of operations. Periods of low interest rates reduce the discount rate we use to calculate our funding obligations, which may increase our funding requirements. Additionally, changes to laws, regulations, or rules could require us to increase funding requirements or to compensate for investment losses in pension plan assets. If we were forced to increase contributions to our pension plans, our financial position, results of operations, and cash flows could be negatively affected.

Changes in the mix ofearnings in the US and foreign countries could adversely affect our effective tax rate.

We are subject to taxes in the United States and various foreign jurisdictions. As a result, our effective tax rate could be adversely affected by changes in the mix of earnings in the United States and foreign countries with differing statutory tax rates. Our effective tax rate could also be adversely affected by changes in tax laws, material audit assessments, or legislative changes that impact statutory tax rates, which could include an impact on previously-recorded deferred tax assets and liabilities.

Our allowance for losses may be inadequate.

Our allowance for losses on reservable assets may not be adequate to cover credit losses in our portfolio if unexpected adverse changes occur in macroeconomic conditions or if discrete events adversely affect specific customers, industries, or markets. If the credit quality of our customer base materially deteriorates, it may require us to incur additional credit losses and our financial position or results of operations could be negatively impacted.

We cannot predict with certainty the impact that inflation or deflation will have on our financial results.

The timing and duration of the effects of inflation are unpredictable and depend on market conditions and economic factors. Inflation in lease rates as well as inflation in residual values for rail and marine assets has historically benefited our financial results. However, these benefits may be offset by increases in the costs for goods and services we purchase, including salaries and wages, health care costs, supplies, utilities, maintenance and repair services, and materials, as well as increased financing costs. Significant increases in our cost of goods and services could adversely impact our financial performance. Conversely, a period of prolonged deflation could negatively impact our lease rate pricing, residual values, and asset remarketing opportunities. These negative impacts of deflation may be offset by decreases to our costs for goods and services, including those listed above.

We could be adversely affected by United States and global political conditions, including acts or threatsof terrorism or war.

We may be adversely affected by national and international political developments, instability, and uncertainties, including political unrest and threats of terrorist attacks, which could lead to the following:

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• Legislation or regulatory action directed toward improving the security of railcars and marine vessels against acts of terrorism, which could affect the construction or operation of railcars and marine vessels

• A decrease in demand for rail and marine services

• Lower utilization of rail and marine equipment

• Lower rail lease and marine charter rates

• Impairments of rail and marine assets or capital market disruption, which may raise our financing costs or limit our access to capital

• Liability or losses resulting from acts of terrorism involving our assets

• A downturn in the commercial aviation industry, which could lead to adverse financial results for our RRPF affiliates.

Depending upon the severity, scope, and duration of these circumstances, the impact on our financial position, results of operations, and cash flows could be material.

We rely on technology in all aspects of our business operations. If we are unable to adequately maintain and secure our IT infrastructure from cybersecurity threats and related disruptions, our business could be negatively impacted.

We rely on our IT infrastructure to process, transmit, and store electronic information that is critical to all aspects of our business operations, including employee and customer information. All IT systems are vulnerable to security threats, such as hacking, viruses, malicious software, and other unlawful attempts to disrupt or gain access to these systems. Although we have taken steps to mitigate these risks, we may not be able to prevent breaches of our IT infrastructure, some of which is managed by third parties. Breaches of our IT infrastructure could lead to disruptions in our business, potentially including the theft, destruction, loss, misappropriation, or release of confidential employee and customer information stored on our IT systems or confidential data or other business information and subject us to potential lawsuits or other material legal liabilities. These disruptions could adversely affect our operations, financial position, and results of operations.

Our internal control over financial accounting and reporting may not detect all errors or omissions in the financial statements.

If we fail to maintain adequate internal controls over financial accounting, we may not be able to conclude on an ongoing basis that we have effective internal control over financial reporting in accordance with Section 404 of the Sarbanes-Oxley Act of 2002 and related regulations. Although management has concluded that adequate internal control procedures are in place, no system of internal control provides absolute assurance that the financial statements are accurate and free of error.

Item 1B.  Unresolved Staff Comments

None.

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Item 2.  Properties

Information regarding the general character of our properties is included in Item 1, “Business” of this Form 10-K.

As of December 31, 2015, our locations of operations were as follows:

	GATX Headquarters
	Chicago, Illinois
Rail North America
Business Offices	Major Maintenance Facilities	Mobile Units
Alpharetta, Georgia	Colton, California	Camp Minden, Louisiana
Chicago, Illinois	Hearne, Texas	Copperhill, Tennessee
Houston, Texas	Waycross, Georgia	Donaldsonville, Louisiana
Mexico City, Mexico	Montreal, Quebec	Galena Park, Texas
Mississauga, Ontario	Moose Jaw, Saskatchewan	Freeport, Texas
Montreal, Quebec	Red Deer, Alberta	Macon, Georgia
		East Chicago, Indiana
	Field Maintenance Facilities	Lake Charles, Louisiana
	East Chicago, Indiana	Mobile, Alabama
	Kansas City, Kansas	Kansas City, Kansas
	Plantersville, Texas	Olympia, Washington
	Terre Haute, Indiana	Sioux City, Iowa
	Sarnia, Ontario	Lakeland, Florida
		Clarkson, Ontario
	Customer Site Locations	Edmonton, Alberta
	Aurora, North Carolina	Moose Jaw, Saskatchewan
	Catoosa, Oklahoma	Montreal, Quebec
	Donaldsonville, Louisiana	Quebec City, Quebec
	Freeport, Texas	Red Deer, Alberta
	Geismar, Louisiana	Sarnia, Ontario
	Yazoo City, Mississippi
Rail International
Business Offices	Major Maintenance Facilities	Customer Site Locations
Düsseldorf, Germany	Hannover, Germany	Płock, Poland
Hamburg, Germany	Ostróda, Poland
Leipzig, Germany
Moscow, Russia
Gurgaon, India
Paris, France
Vienna, Austria
Warsaw, Poland
	American Steamship Company
	Duluth, Minnesota
	Toledo, Ohio
	Williamsville, New York
	Portfolio Management
	Chicago, Illinois

22

Item 3.  Legal Proceedings

Information concerning litigation and other contingencies is described in "Note 24. Legal Proceedings and Other Contingencies" in Part II, Item 8 of this Form 10-K and is incorporated herein by reference.

Item 4.  Mine Safety Disclosures

None.

23

PART II

Item 5.  Market for Registrant’s Common Equity, Related StockholderMatters, and Issuer Purchases of Equity Securities

Our common stock is listed on the New York and Chicago Stock Exchanges under ticker symbol GMT. We had approximately 1,925 common shareholders of record as of January 31, 2016. The following table shows the reported high and low sales price of our common shares and the dividends declared per share:

									2015		2014
	2015		2015		2014		2014		Dividends Declared		Dividends Declared
Common Stock	High		Low		High		Low
First quarter	$	63.36	$	52.67	$	69.87	$	50.80	$	0.38	$	0.33
Second quarter	61.41		53.10		69.00		62.48		0.38		0.33
Third quarter	53.72		42.94		68.45		58.21		0.38		0.33
Fourth quarter	50.56		37.95		65.87		52.51		0.38		0.33

Issuer Purchases of Equity Securities

In 2015, we repurchased 2.4 million shares for $125.4 million, which completed our $250 million repurchase authorization approved in 2014. In 2014, we repurchased 1.9 million shares for $124.6 million. Subsequent to December 31, 2015, our board of directors authorized a new $300 million stock repurchase program. The timing of share repurchases will be dependent on various factors.

The following is a summary of common stock repurchases completed by month during the fourth quarter of 2015 (in millions, except per share amounts):

Issuer Purchases of Equity Securities
	(a)	(b)		(c)	(d)
Total	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under the Plans or Programs
October 1, 2015 - October 31, 2015	309,646	$	46.43	309,646	$	—

24

Equity Compensation Plan Information as of December 31, 2015:

	Number of Securities to be Issued Upon Exercise of Outstanding Options, Warrants and Rights		Weighted-Average Exercise Price of Outstanding Options, Warrants and Rights			Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (excluding securities reflected in Column (a))
Plan Category	(a)		(b)			(c)
Equity Compensation Plans Approved by Shareholders	2,127,852	(1)	$	45.18	(2)	1,832,518
Equity Compensation Plans Not Approved by Shareholders	—					—
Total	2,127,852					1,832,518

__________

(1) Consists of 1,573,716 stock appreciation rights, 214,371 performance shares, 173,744 restricted stock units and 166,021 phantom stock units.

(2) The weighted-average exercise price does not include performance shares, restricted stock or phantom stock units.

For additional information about issuable securities under our equity compensation plans and the related weighted average exercise price, see "Note 13. Share-Based Compensation" in Part II, Item 8 of this Form 10-K.

25

Common Stock Performance Graph

The performance graph below compares the cumulative total shareholder return on our common stock for the five-year period ended December 31, 2015, with the cumulative total return of the S&P 500, the S&P MidCap 400, and the Russell 3000. We are not aware of any peer companies whose businesses are directly comparable to ours and, therefore, the graph displays the returns of the S&P 500, the S&P MidCap 400 and the Russell 3000 since those indices are comprised of companies with market capitalizations similar to ours. The graph and table assume that $100 was invested in our common stock and each of the indices on December 31, 2010, and that all dividends were reinvested.

	12/31/10		12/31/11		12/31/12		12/31/13		12/31/14		12/31/15
GATX	$	100.00	$	127.78	$	130.40	$	161.12	$	181.54	$	138.42
S&P 500	100.00		102.08		118.39		156.70		178.10		180.56
S&P MidCap 400	100.00		98.25		115.74		154.45		169.47		165.78
Russell 3000	100.00		101.00		117.57		157.02		176.70		177.55

26

Item 6.  Selected Financial Data

The following financial information has been derived from our audited consolidated financial statements for the years ended December 31 (in millions, except per share data, recourse leverage, and return on equity). This information should be read in conjunction with "Management’s Discussion and Analysis of Financial Condition and Results of Operations" and the consolidated financial statements and accompanying notes thereto included elsewhere herein.

	2015			2014			2013			2012			2011
Results of Operations
Revenue	$	1,449.9		$	1,451.0		$	1,321.0		$	1,243.2		$	1,191.4
Net gain on asset dispositions	79.2			87.2			85.6			79.5			65.8
Share of affiliates’ earnings (pretax)	45.4			67.8			92.3			21.6			40.6
Net income	205.3			205.0			169.3			137.3			110.8
Net income, excluding tax adjustments and other items (1)	234.9			205.0			164.8			133.8			95.0
Per Share Data
Basic earnings	4.76			4.55			3.64			2.93			2.39
Diluted earnings	4.69			4.48			3.59			2.88			2.35
Diluted earnings, excluding tax adjustments and other items (1)	5.37			4.48			3.50			2.81			2.01
Dividends declared	1.52			1.32			1.24			1.20			1.16
Financial Condition
Operating assets and facilities, net of accumulated depreciation	$	5,698.4		$	5,688.0		$	5,070.3		$	4,654.4		$	4,359.3
Investments in affiliated companies	348.5			357.7			354.3			502.0			513.8
Total assets	6,894.2			6,919.9			6,535.5			6,044.7			5,846.0
Off-balance sheet assets (1)	495.5			617.8			904.4			884.5			887.1
Short-term borrowings	7.4			72.1			23.6			273.6			28.6
Long-term debt and capital lease obligations	4,196.8			4,184.5			3,833.3			3,283.6			3,507.0
Shareholders’ equity	1,280.2			1,314.0			1,397.0			1,244.2			1,127.3
Other Data
Average number of common shares and common share equivalents	43.8			45.8			47.1			47.6			47.2
Net cash provided by operating activities	$	534.3		$	449.2		$	400.7		$	370.2		$	306.8
Portfolio proceeds	$	482.2		$	264.0		$	385.3		$	288.9		$	154.1
Portfolio investments and capital additions	$	714.7		$	1,030.5		$	859.6		$	770.0		$	614.6
Recourse leverage	3.5			3.5			3.0			3.2			3.4
ROE	15.8		%	15.1		%	12.8		%	11.6		%	9.9		%
ROE, excluding tax adjustments and other items (1)	18.1		%	15.1		%	12.5		%	11.3		%	8.5		%

__________

(1) See "Non-GAAP Financial Measures" included in "Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations" of this Form 10-K for an explanation of tax adjustments and other items.

27

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

OVERVIEW

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail market. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”), and Portfolio Management.A more complete description of our business is included in "Item 1. Business," in Part I of this Form 10-K.

The following discussion and analysis should be read in conjunction with the audited financial statements included in "Item 8. Financial Statements and Supplementary Data" in this Form10-K. We based the discussion and analysis that follows on financial data we derived from the financial statements prepared in accordance with US generally accepted accounting principles ("GAAP") and on certain other financial data that we prepared using non-GAAP components. For a reconciliation of these non-GAAP components to the most comparable GAAP components, see “Non-GAAP Financial Measures” at the end of this item.

DISCUSSION OF OPERATING RESULTS

The following table shows a summary of our reporting segments and consolidated financial results for years ended December 31 (in millions, except per share data and percentages):

	2015			2014			2013
Segment Revenues
Rail North America	$	1,006.8		$	927.5		$	817.1
Rail International	180.4			198.9			189.0
ASC	170.2			227.2			227.7
Portfolio Management	92.5			97.4			87.2
	$	1,449.9		$	1,451.0		$	1,321.0
Segment Profit
Rail North America	$	379.5		$	321.0		$	231.6
Rail International	70.1			78.7			97.4
ASC	15.1			27.3			28.9
Portfolio Management	49.8			68.2			74.4
	514.5			495.2			432.3
Less:
Selling, general and administrative expense	192.4			189.2			178.3
Unallocated interest expense, net	5.3			5.4			3.8
Other, including eliminations	1.1			1.6			(1.1		)
Income taxes (($0.5), $18.3 and $16.5 related to affiliates' earnings)	110.4			94.0			82.0
Net Income	$	205.3		$	205.0		$	169.3
Net income, excluding tax adjustments and other items	$	234.9		$	205.0		$	164.8
Diluted earnings per share	4.69			4.48			3.59
Diluted earnings per share, excluding tax adjustments and other items	5.37			4.48			3.50
Return on equity	15.8		%	15.1		%	12.8		%
Return on equity, excluding tax adjustments and other items	18.1		%	15.1		%	12.5		%
Investment Volume	$	714.7		$	1,030.5		$	859.6

28

2015 Summary

Net income was $205.3 million, or $4.69 per diluted share, for 2015 compared to $205.0 million, or $4.48 per diluted share, for 2014, and $169.3 million, or $3.59 per diluted share, for 2013. Results included the impact of tax adjustments and other items of a $29.6 million loss in 2015 and a $4.5 million benefit in 2013 (see "Non-GAAP Financial Measures" at the end of this item for further details). Excluding the impact of these items, net income increased $29.9 million, or 14.6%, in 2015 compared to 2014 and $40.2 million, or 24.4%, in 2014 compared to 2013.

• At Rail North America, higher lease rates, a full year contribution of the boxcar fleet acquired in 2014, lower net maintenance expenses, and higher remarketing gains were partially offset by lower scrapping proceeds, resulting in a net increase in segment profit in 2015.

• At Rail International, segment profit in 2015 declined primarily due to the effects of foreign exchange offsetting higher lease revenue and lower net maintenance expenses.

• At ASC, segment profit was lower in 2015, largely due to lower demand for iron ore shipments.

• At Portfolio Management, segment profit declined, as the impact of the planned exit of the majority of marine investments more than offset higher income at our Rolls-Royce Partners Finance affiliates.

Total investment volume was $714.7 million in 2015, compared to $1,030.5 million in 2014 and $859.6 million in 2013.

2016 Outlook

Despite increasing global economic uncertainty, a slowdown in the US energy markets, and a declining railcar leasing market, we are well positioned to continue to benefit from our North American fleet actions over the past few years. By extending average lease terms and optimizing our fleet, we have reduced the number of leases scheduled for expiration in 2016, relative to prior years. For those cars that do expire in 2016, markets will generally be weaker than in 2015, and our focus for these cars will be keeping them on lease to maximize our fleet utilization. In the weakest sectors of the North American rail market, we will also focus on shortening lease terms to optimize our ability to reprice these leases when those markets recover. In 2016, we will continue to use our supply agreements to pursue new car placements with customers. Our strong balance sheet also offers us flexibility to pursue attractive secondary market acquisitions if opportunities arise.

• We expect Rail North America's segment profit in 2016 to decrease from 2015, primarily due to lower expected railcar remarketing activity.

• We anticipate Rail International's segment profit in 2016 to be similar to 2015, as higher lease revenue is offset by higher maintenance expenses and foreign currency impacts.

• We expect ASC’s segment profit to be higher in 2016, resulting from improved fleet efficiency. However, uncertainty in the steel industry and the related impact on tonnage carried will continue to be a driver of segment results.

• We believe Portfolio Management's segment profit in 2016 will be comparable to 2015 as performance at the Rolls-Royce Partners Finance affiliates will continue to drive segment results.

29

Segment Operations

Segment profit is an internal performance measure used by the Chief Executive Officer to assess the performance of each segment in a given period. Segment profit includes all revenues, pretax earnings from affiliates, and net gains on asset dispositions that are attributable to the segments, as well as expenses that management believes are directly associated with the financing, maintenance, and operation of the revenue earning assets. Segment profit excludes selling, general and administrative expenses, income taxes, and certain other amounts not allocated to the segments. These amounts are included in Other.

We allocate debt balances and related interest expense to each segment based upon a predetermined fixed recourse leverage level expressed as a ratio of recourse debt (including off-balance sheet debt) to equity. The leverage levels are 5:1 for Rail North America, 2:1 for Rail International, 1.5:1 for ASC, and 3:1 for Portfolio Management. We believe that by using this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

RAIL NORTH AMERICA

Segment Summary

At the end of the first quarter of 2014, we acquired more than 18,500 boxcars from General Electric Railcar Services Corporation for approximately $340 million (the "Boxcar Fleet"). At December 31, 2015, Rail North America's wholly owned fleet, excluding boxcars, consisted of approximately 106,100 cars. Fleet utilization, excluding boxcars, was 99.1% at the end of 2015, compared to 99.2% at the end of 2014, and 98.5% at the end of 2013. Fleet utilization for approximately 18,400 boxcars was 97.7% at the end of 2015 compared to 92.7% at the end of 2014, and 78.8% upon acquisition of the Boxcar Fleet.

The rail market weakened as the year progressed, resulting in a more challenging lease rate environment. During the year, the Lease Price Index on renewals (the "LPI", see definition below) increased 32.2%, compared to an increase of 38.8% in 2014, and 34.5% in 2013. Lease terms on renewals for cars in the LPI averaged 54 months in 2015, compared to 66 months in 2014, and 62 months in 2013. During 2015, an average of approximately 106,000 railcars, excluding boxcars, were on lease, compared to 105,800 in 2014, and 106,200 in 2013. The decline in demand, and the resulting decline in lease rates, was broad-based, but was particularly severe among cars serving the coal, frac sand, and flammable liquids markets.

In 2011, we entered into a purchase agreement with Trinity Rail Group, LLC ("Trinity") for 12,500 railcars through mid-2016, which was the largest such commitment in our history. In 2014, we entered into a new long-term supply agreement with Trinity to take effect upon the scheduled expiration of the current railcar supply agreement in 2016. Under the terms of this agreement, we may order up to 8,950 newly built railcars over a four-year period from March, 2016 through March, 2020. As of December 31, 2015, we have received customer commitments to lease 12,400 railcars from the 2011 Trinity supply agreement and 1,200 railcars from the 2014 Trinity supply agreement. Of those railcars, 10,100 have been delivered from the 2011 agreement and none have been delivered from the 2014 agreement.

In 2016, we expect a decrease in segment profit due to lower expected railcar remarketing activity. As current market lease rates decline and expiring rates increase (resulting from the expiration of leases originated in the stronger markets of prior years), we expect the LPI to decrease from 2015's levels. Leases for approximately 12,500 railcars in our term lease fleet and approximately 5,500 boxcars are scheduled to expire in 2016. These amounts exclude railcars on leases that are scheduled to expire in 2016 but have already been renewed or assigned to a new lessee.

30

The following table shows Rail North America's segment results for the years ended December 31 (in millions):

	2015			2014			2013
Revenues
Lease revenue	$	930.9		$	864.1		$	758.9
Other revenue	75.9			63.4			58.2
Total Revenues	1,006.8			927.5			817.1
Expenses
Maintenance expense	264.2			265.5			228.2
Depreciation expense	215.1			190.0			176.7
Operating lease expense	82.2			103.7			124.4
Other operating expense	26.2			21.9			18.4
Total Expenses	587.7			581.1			547.7
Other Income (Expense)
Net gain on asset dispositions	67.2			72.3			67.7
Interest expense, net	(102.1		)	(98.4		)	(106.0		)
Other expense	(5.2		)	(7.2		)	(9.8		)
Share of affiliates' earnings (pretax)	0.5			7.9			10.3
Segment Profit	$	379.5		$	321.0		$	231.6
Investment Volume	$	524.5		$	810.6		$	502.4

The following table shows the components of Rail North America's lease revenue for the years ended December 31 (in millions):

	2015		2014		2013
Railcars (excluding boxcars)	$	809.7	$	764.5	$	716.9
Boxcars	83.6		64.7		9.8
Locomotives	37.6		34.9		32.2
	$	930.9	$	864.1	$	758.9

Lease Price Index

Our LPI is an internally-generated business indicator that measures lease rate pricing on renewals for our North American railcar fleet, excluding boxcars. We calculate the index using the weighted average lease rate for a group of railcar types that we believe best represents our overall North American fleet, excluding boxcars. The average renewal lease rate change is reported as the percentage change between the average renewal lease rate and the average expiring lease rate, weighted by fleet composition. The average renewal lease term is reported in months and reflects the average renewal lease term of railcar types in the LPI, weighted by fleet composition.

31

Rail North America Fleet Data

The following table shows fleet activity for Rail North America railcars, excluding boxcars, for the years ended December 31:

	2015		2014		2013
Beginning balance	107,343		107,004		107,826
Cars added	3,762		3,453		4,596
Cars scrapped	(1,445	)	(1,397	)	(1,693	)
Cars sold	(3,514	)	(1,717	)	(3,725	)
Ending balance	106,146		107,343		107,004
Utilization rate at year end	99.1	%	99.2	%	98.5	%
Active railcars at year end	105,164		106,500		105,394
Average (monthly) active railcars	105,987		105,791		106,186

32

The following table shows fleet statistics for Rail North America boxcars for the years ended December 31:

	2015		2014		2013
Ending balance	18,429		19,021		2,109
Utilization rate at year end	97.7	%	92.7	%	100.0	%

The following table shows fleet activity for Rail North America locomotives for the years ended December 31:

	2015		2014		2013
Beginning balance	603		595		561
Locomotives added	34		8		83
Locomotives scrapped or sold	—		—		(49	)
Ending balance	637		603		595
Utilization rate at year end	93.3	%	99.3	%	98.2	%
Active locomotives at year end	584		599		584
Average (monthly) active locomotives	589		590		547

33

Segment Profit

In 2015, segment profit was $379.5 million, compared to $321.0 million in 2014. The increase was driven by higher lease rates, a positive contribution from the full year impact of the Boxcar Fleet in 2015, and lower net maintenance expense, partially offset by higher depreciation expense and lower share of affiliates' earnings.

In 2014, segment profit was $321.0 million, compared to $231.6 million in 2013. The increase was primarily driven by higher lease rates and more cars on lease, including the Boxcar Fleet, partially offset by higher net maintenance expense and depreciation expense. The results in 2014, compared to 2013, were also favorably impacted by a change in depreciation implemented during the year. Effective January 1, 2014, we revised the depreciable lives of our North American railcars based on a review of the current economic lives and usage of various railcar types. In aggregate, the average depreciable life of the fleet increased approximately 2.2 years. This change had a positive $21.9 million impact on segment profit for 2014.

Revenues

In 2015, lease revenue increased $66.8 million, primarily due to higher lease rates across the fleet and a full year of revenue in 2015 from the acquired Boxcar Fleet. Other revenue increased $12.5 million, primarily due to higher repair revenue, mileage equalization revenue, and lease termination fees.

In 2014, lease revenue increased $105.2 million, primarily due to the impact of the Boxcar Fleet and higher lease rates. Other revenue increased $5.2 million, primarily due to higher repair revenue in 2014.

Expenses

In 2015, maintenance expense decreased $1.3 million, primarily due to lower tank car compliance maintenance, partially offset by higher costs attributable to the boxcar fleet. Depreciation expense increased $25.1 million, largely due to depreciation on new investments, including the Boxcar Fleet. Operating lease expense decreased $21.5 million, resulting from the purchase of railcars previously on operating leases in each year. Other operating expense increased $4.3 million, primarily due to higher switching, storage, and freight costs, as well as a higher loss reserve in 2015.

In 2014, maintenance expense increased $37.3 million, primarily due to costs associated with the Boxcar Fleet. Excluding boxcars, maintenance expense was still higher in 2014 as a result of the expected increase in compliance costs and repairs. Depreciation expense increased $13.3 million, primarily due to incremental depreciation from new investments, including the Boxcar Fleet, partially offset by the impact of the accounting policy change in estimated useful lives of the railcar fleet implemented as of January 1, 2014. Operating lease expense decreased $20.7 million due to the purchase of railcars previously on operating leases in each year. Other operating expense increased $3.5 million, primarily due to higher switching and freight costs.

Other Income (Expense)

In 2015, net gain on asset dispositions decreased $5.1 million, primarily due to lower scrapping proceeds, resulting from lower rates and fewer cars scrapped, as well as lower residual sharing gains, and higher impairments of railcars in 2015. These impacts were partially offset by higher gains on cars sold. Net interest expense increased $3.7 million, primarily due to higher average debt balances, partially offset by the impact of lower average interest rates. Share of affiliates' earnings decreased $7.4 million, primarily due to gains on dispositions of railcars at our Southern Capital affiliate in the prior year.

In 2014, net gain on asset dispositions increased $4.6 million, primarily due to higher gains on cars sold, partially offset by lower scrapping gains. Net interest expense decreased $7.6 million, driven by lower average rates and the impact of prepayments of higher cost debt more than offsetting a higher average debt balance. Other expense decreased $2.6 million, primarily due to higher penalties associated with the early repayment of debt and higher termination costs associated with the early buyouts of railcars on operating leases in 2013 compared to 2014. Share of affiliates' earnings decreased $2.4 million, primarily due to income at our Southern Capital affiliate in 2013.

34

Investment Volume

During 2015, investment volume was $524.5 million compared to $810.6 million in 2014, and $502.4 million in 2013. We acquired approximately 3,790 railcars in 2015, compared to 3,570 railcars in 2014, and 4,520 railcars in 2013. Additionally, investments in 2014 included the purchase of the Boxcar Fleet of approximately 18,500 boxcars for approximately $340 million.

North American Rail Regulatory Matters

On May 1, 2015, the Pipeline and Hazardous Materials Safety Administration of the US Department of Transportation (“PHMSA”) issued final rules that established new design standards for tank cars in flammable liquids service (the “PHMSA Rules”). The PHMSA Rules became effective on July 7, 2015, and all newly built tank cars for use in certain flammable liquids service were required to comply with the new design standards commencing on October 1, 2015. The PHMSA Rules also established standards for modifications to existing tank cars in certain flammable liquids service and deadlines for modifying or removing those cars from service. The US Congress subsequently adopted the Fixing America’s Surface Transportation Act (“FAST Act”), which changed certain requirements of the PHMSA Rules. Key changes included revisions to the design standards for modified cars, amendments to the modification deadlines, and expansion of the applicability of the new tank car design standards to all cars used in flammable liquids service, not only those cars that operate in trains consisting of large numbers of tank cars carrying flammable liquids. Under the FAST Act, the deadlines for modifying or removing existing tank cars from flammables service range from January 2018 to May 2029, depending on the type of car and the type of commodity carried. While several legal challenges to the PHMSA Rules are pending in the US Circuit Court for the District of Columbia, the tank car design standards and the deadlines for modifying or removing cars from service were enacted into law by the FAST Act, and therefore, are unlikely to be affected by the outcome of these legal challenges.

On May 1, 2015, Transport Canada (“TC”) issued final rules establishing new design standards for tank cars carrying flammable liquids in Canada (the “Canadian Rules”). The Canadian Rules became effective on May 20, 2015, and all newly built tank cars for use in flammable liquids service were required to comply with the new standards effective October 1, 2015. The Canadian Rules also established standards for modifications to existing tank cars in flammable liquids service and deadlines for modifying or removing cars from service ranging from May 2017 to May 2025, depending on the type of car and the type of commodity carried.

We have a fleet of approximately 125,000 railcars in North America, including approximately 13,900 tank cars currently used to transport flammable liquids that are affected by the new rules, of which approximately 4,300 are moving crude oil and ethanol. Over 90% of our affected tank cars have a compliance deadline of 2023 or later. We expect to modify some of the most modern of our affected tank cars to comply with the new standards. However, for the majority of the affected cars, we currently anticipate retiring, redeploying, or selling them rather than performing retrofits.

RAIL INTERNATIONAL

Segment Summary

Rail International, comprised primarily of GATX Rail Europe ("GRE"), achieved solid operating results during 2015. Throughout 2015, we invested in the European fleet to replace our customers' older, less efficient fleets with newer, higher capacity railcars. Railcar utilization for GRE was 95.8% at the end of 2015, compared to 95.9% at the end of 2014, and 96.6% at the end of 2013. During 2013, we sold our 37.5% interest in Ahaus Alstätter Eisenbahn Cargo AG (“AAE”).

Rail India has continued to focus on investment opportunities and developing relationships with customers, suppliers and the Indian Railways. In 2015, Rail India took delivery of 410 railcars, compared to 184 railcars in 2014 and 137 railcars in 2013. Continued investment in railcars is expected in 2016.

35

The following table shows Rail International's segment results for the years ended December 31 (in millions):

	2015			2014			2013
Revenues
Lease revenue	$	172.9		$	188.6		$	180.2
Other revenue	7.5			10.3			8.8
Total Revenues	180.4			198.9			189.0
Expenses
Maintenance expense	39.6			45.9			42.9
Depreciation expense	43.7			47.1			43.2
Other operating expense	5.1			5.1			5.3
Total Expenses	88.4			98.1			91.4
Other Income (Expense)
Net gain on asset dispositions	6.8			6.0			3.7
Interest expense, net	(22.4		)	(24.7		)	(23.9		)
Other expense	(6.0		)	(3.1		)	(1.1		)
Share of affiliates' earnings (pretax)	(0.3		)	(0.3		)	21.1
Segment Profit	$	70.1		$	78.7		$	97.4
Investment Volume	$	148.0		$	163.6		$	168.5

The following table shows fleet activity for GRE railcars for the years ended December 31:

	2015		2014		2013
Beginning balance	22,451		21,836		21,794
Cars added	1,421		1,672		1,368
Cars scrapped or sold	(949	)	(1,057	)	(1,326	)
Ending balance	22,923		22,451		21,836
Utilization rate at year end	95.8	%	95.9	%	96.6	%
Active railcars at year end	21,969		21,533		21,097
Average (monthly) active railcars	21,598		20,915		20,913

36

\

Foreign Currency

Rail International's reported results of operations are impacted by fluctuations in the exchange rates of the foreign currencies in which it conducts business, primarily the euro. In 2015, a weaker euro negatively impacted lease revenue by approximately $30.8 million and segment profit, excluding other income (expense), by approximately $16.1 million compared to 2014. Although the Euro was weaker at the end of 2014 compared to 2013, the average exchange rate for each year was comparable and had no material impact on reported segment profit.

Segment Profit

In 2015, segment profit was $70.1 million, compared to $78.7 million in 2014. The decrease was largely due to the negative effects of foreign exchange.

In 2014, segment profit was $78.7 million, compared to $97.4 million in 2013. The 2013 results included a gain of $9.3 million on the sale of our AAE investment and gains of $7.7 million related to certain interest rate swaps at AAE. Excluding the effect of the AAE items noted, segment profit decreased $1.7 million in 2014. This decrease was largely due to lower share of affiliates’ earnings, higher maintenance expense and higher depreciation expense, partially offset by higher lease revenue.

AAE held interest rate swaps intended to hedge interest rate risk associated with existing and forecasted floating rate debt issuances. Some of these swaps did not qualify for hedge accounting, and as a result, changes in their fair values were recognized in affiliates' earnings.

Revenues

In 2015, lease revenue decreased $15.7 million, due to the effects of a weaker euro, as noted above. The decrease was partially offset by additional cars on lease in the current year. Other revenue decreased $2.8 million, primarily due to the absence of interest income on the AAE note received as part of the sale, which was repaid in the first quarter of 2015.

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In 2014, lease revenue increased $8.4 million, primarily due to more cars on lease. Other revenue increased $1.5 million, primarily due to higher interest income on the AAE note.

Expenses

In 2015, maintenance expense decreased $6.3 million, primarily due to the effects of a weaker euro, lower costs at our European maintenance facilities, and lower costs for wheelset replacements, partially offset by the higher cost of railcar revisions. Depreciation expense decreased $3.4 million, largely due to the effects of a weaker euro, partially offset by the impact of new cars added to the fleet.

In 2014, maintenance expense increased $3.0 million, primarily due to higher workshop expenses and costs for wheelset replacements. Depreciation expense increased $3.9 million, largely driven by the impact of new cars added to the fleet.

Other Income (Expense)

In 2015, net interest expense decreased $2.3 million, driven by the effects of foreign exchange. Other expense increased $2.9 million, primarily due to higher legal costs in 2015 and income from a warranty settlement in 2014, partially offset by the favorable impact of changes in foreign exchange rates on non-functional currency items and derivatives.

In 2014, net gain on asset dispositions increased $2.3 million compared to 2013, primarily due to impairments in 2013 for railcars designated to be scrapped. Net interest expense increased $0.8 million due to higher average debt balances, partially offset by lower rates. Other expense increased $2.0 million, primarily due to higher legal costs and the unfavorable impact of foreign exchange on non-functional currency items compared to 2013, partially offset by a warranty settlement in 2014. Excluding the impacts of the AAE disposition gain and the interest rate swaps from each period, share of affiliates' earnings decreased $4.4 million, primarily due to the absence of operating income at AAE after the sale in 2013.

Investment Volume

Investment volume was $148.0 million in 2015, $163.6 million in 2014, and $168.5 million in 2013. During 2015, we acquired approximately 1,980 railcars compared to 1,860 railcars in 2014, and 1,500 railcars in 2013. Additionally, capitalized wheelset costs were $4.6 million in 2015, $4.8 million in 2014, and $25.7 million in 2013.

ASC

Segment Summary

In 2015, ASC experienced lower demand for iron ore shipments as steel production in the region declined. As a result, several ASC vessels were laid up earlier than in prior years. During 2015, there were thirteen vessels operating and the season concluded in mid-January. While operating conditions and water levels led to improved efficiencies, the lower iron ore tonnage in 2015 reduced segment profit significantly.

ASC carried 26.5 million net tons of freight and deployed 13 vessels in 2015 compared to 30.5 million net tons and 15 vessels in 2014 and 28.8 million net tons and 13 vessels in 2013.

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The following table shows ASC’s segment results for the years ended December 31 (in millions):

	2015			2014			2013
Revenues
Lease revenue	$	4.1		$	4.2		$	4.2
Marine operating revenue	166.1			223.0			223.5
Total Revenues	170.2			227.2			227.7
Expenses
Maintenance expense	22.3			25.6			22.9
Marine operating expense	107.2			149.2			151.3
Depreciation expense	14.3			13.6			12.1
Operating lease expense	5.2			5.2			5.2
Other operating expense	—			—			—
Total Expenses	149.0			193.6			191.5
Other Income (Expense)
Net loss on asset dispositions	(0.1		)	(0.5		)	(1.3		)
Interest expense, net	(5.3		)	(5.6		)	(6.2		)
Other (expense) income	(0.7		)	(0.2		)	0.2
Segment Profit	$	15.1		$	27.3		$	28.9
Investment Volume	$	20.3		$	18.4		$	11.2

\

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Segment Profit

In 2015, segment profit was $15.1 million compared to $27.3 million in 2014. Both periods were unfavorably impacted by difficult operating conditions on the Great Lakes at the start of each sailing season. Additionally, results in 2015 were negatively impacted by lower shipments of higher-margin, long-haul iron ore.

In 2014, segment profit was $27.3 million compared to $28.9 million in 2013. The variance was largely attributable to ice coverage on the Great Lakes in 2014 that led to significant operating inefficiencies early in the year.

Revenues

In 2015, marine operating revenue decreased $56.9 million, largely due to $37.6 million lower fuel revenue, which is offset in marine operating expense. The terms of ASC's contracts provide that a portion of fuel costs may be passed on to customers. In addition, lower long-haul shipments of iron ore contributed to the variance.

In 2014, marine operating revenue decreased $0.5 million, primarily due to the operating inefficiencies early in the year, the mix of commodities carried, and lower fuel surcharge revenue, which is offset by a corresponding decrease in marine operating expense.

Expenses

In 2015, maintenance expense decreased $3.3 million, due to less winter work and lower operating repairs. Marine operating expense decreased $42.0 million, largely driven by lower fuel costs and the impact of fewer operating days caused by the delay of deployment of vessels at the beginning of the season and fewer vessels operating late in the year. Inefficiencies associated with the extended winter conditions earlier in each year also negatively impacted operations in both years.

In 2014, maintenance expense increased $2.7 million, driven by more winter work and costs associated with deploying two additional vessels in 2014 compared to 2013. Marine operating expense decreased $2.1 million largely due to lower fuel consumption and lower fuel costs, which is largely offset in revenue. These increases were partially offset by the impact of more operating days and additional vessels deployed in the current year.

Operating lease expense in 2015, 2014 and 2013 relates to the lease of ASC's tug-barge vessel.

Other Income (Expense)

Net loss on asset dispositions in each year was attributable to the initial impairment and subsequent costs related to the ultimate disposal of an older, idle vessel. Additionally, interest expense declined each year due to lower rates.

Investment Volume

ASC's investments in each of 2015, 2014, and 2013 consisted of structural and mechanical upgrades to our vessels.

PORTFOLIO MANAGEMENT

Segment Summary

In prior years, GATX indicated that it would no longer seek new investment opportunities in marine assets within Portfolio Management and would focus on maximizing the value of existing investments. In the third quarter of 2015, we made the decision to exit the majority of our marine investments, including six chemical parcel tankers (the "Nordic Vessels"), a number of inland marine vessels and our 50% interest in the Cardinal Marine joint venture. We believe that selling these investments at this time will provide favorable returns for GATX and eliminate the future risk of continuing to hold these investments in markets that have become more volatile. As a result of this decision, impairment losses of $30.8 million on the Nordic Vessels and $19.0 million on the Cardinal Marine joint venture were

40

recognized. Subsequently, we have completed the sales of certain of our marine investments, including our 50% interest in the Cardinal Marine joint venture, for total proceeds of $124.4 million. These sales resulted in net gains of $21.6 million. We expect to complete additional sales of marine assets in 2016. Upon completion of the marine investment sales, Portfolio Management will continue to own other marine investments, consisting primarily of five gas carrying vessels (the "Norgas Vessels").

A significant portion of Portfolio Management's segment profit is generated by the Rolls-Royce & Partners Finance companies. The Rolls-Royce & Partners Finance companies (collectively the “RRPF affiliates”) are a collection of fifteen 50% owned domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. Segment profit included earnings from the RRPF affiliates of $65.5 million for 2015, $55.9 million for 2014, and $52.6 million for 2013. The RRPF affiliates owned 436 aircraft engines at the end of 2015 compared to 433 at the end of 2014.

In 2014, we sold our investments in the Intermodal Investment Fund V and Intermodal Investment Fund VII affiliates. As a result of these sales, we received aggregate cash proceeds of $18.3 million.

In 2013, we dissolved our Singco and Somargas marine affiliates, taking direct ownership of the Norgas Vessels with an aggregate value of $151.8 million, and recognized a pretax gain of $2.5 million, which is reflected in share of affiliates' earnings. In connection with the dissolution, we paid $101.3 million, primarily to satisfy our share of the affiliates' external debt. The vessels continue to operate in a vessel pooling arrangement managed by our former partner.

Portfolio Management's total asset base was $636.5 million at December 31, 2015 compared to $813.3 million at December 31, 2014, and $856.9 million at December 31, 2013.

The following table shows Portfolio Management’s segment results for the years ended December 31 (in millions):

	2015			2014			2013
Revenues
Lease revenue	$	22.2		$	29.7		$	31.9
Marine operating revenue	68.9			63.3			51.6
Other revenue	1.4			4.4			3.7
Total Revenues	92.5			97.4			87.2
Expenses
Marine operating expense	48.7			48.6			38.5
Depreciation expense	17.4			22.8			23.0
Other operating expense	7.1			1.9			2.4
Total Expenses	73.2			73.3			63.9
Other Income (Expense)
Net gain on asset dispositions	5.3			9.4			15.5
Interest expense, net	(20.0		)	(24.3		)	(26.7		)
Other (expense) income	—			(1.2		)	1.4
Share of affiliates' earnings (pretax)	45.2			60.2			60.9
Segment Profit	$	49.8		$	68.2		$	74.4
Investment Volume	$	18.4		$	32.3		$	170.5

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Segment Profit

In 2015, segment profit was $49.8 million, compared to $68.2 million in 2014. The current year included a net loss of approximately $28.2 million associated with the planned exit of the majority of the marine investments. Excluding this net loss, segment profit increased $9.8 million primarily due to higher RRPF affiliate income and higher residual sharing gains on managed portfolio sales.

In 2014, segment profit was $68.2 million, compared to $74.4 million in 2013. The decrease was driven by lower asset remarketing income and lower aggregate net operating income from our marine operations, primarily from our ocean-going vessels, which include the Norgas Vessels and Nordic Vessels.

Revenues

In 2015, lease revenue decreased $7.5 million, primarily due to the impact of sales of leased assets in both years. Marine operating revenue increased $5.6 million, primarily due to higher revenue from the Nordic Vessels and higher inland marine revenue partially offset by lower revenue from the Norgas Vessels. Other revenue decreased $3.0 million primarily due to lower investment fund distributions in 2015 and lower interest income resulting from the repayment of loans in both years.

In 2014, lease revenue decreased $2.2 million, primarily due to the sale of leases throughout 2013 and 2014. Marine operating revenue increased $11.7 million, primarily due to higher inland marine revenue resulting from strong demand during the harvest season. In addition, 2014 includes a full year of revenue from the Norgas Vessels.

Expenses

In 2015, depreciation expense decreased $5.4 million, primarily due to the sale of leased assets. Other operating expense increased $5.2 million, largely due to a loss reserve recorded in 2015 in connection with one investment.

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In 2014, marine operating expense increased $10.1 million, primarily due to higher expenses for inland marine. Additionally, 2014 reflects a full year of operations for the Norgas Vessels.

Other Income (Expense)

In 2015, net gain on asset dispositions decreased $4.1 million. The current year included a net loss of approximately $9.2 million associated with the planned exit of marine investments. Excluding the net loss from the marine investments, net gain on other asset dispositions increased $5.1 million primarily due to higher residual sharing gains on managed portfolio sales. Net interest expense decreased $4.3 million as a result of lower average debt balance and lower average interest rates.

In 2015, share of affiliates' earnings decreased $15.0 million. The current year included the $19.0 million impairment charge for our 50% interest in the Cardinal Marine joint venture. Excluding this item, affiliates' earnings increased $4.0 million primarily due to higher operating income and higher gains on engine sales at the RRPF affiliates in the current year, partially offset by the absence of earnings from joint ventures sold in 2015 and 2014.

In 2014, net gain on asset dispositions decreased $6.1 million, primarily due to fewer asset dispositions. Net interest expense decreased $2.4 million, primarily due to lower rates. Other expense increased $2.6 million, primarily due to the expense associated with a revenue sharing agreement adjustment related to the Nordic Vessels and the absence of insurance proceeds received in 2013 related to a vessel casualty.

In 2014, share of affiliates' earnings decreased $0.7 million, as the absence of income from Singco/Somargas II entities, which were dissolved in 2013, was substantially offset by higher income at the RRPF affiliates.

Investment Volume

Investment volume of $18.4 million in 2015 consisted of $15.5 million for Portfolio Management's share in a newly created RRPF joint venture entity and $2.9 million to convert 51 open hopper barges to covered hopper barges.

Investment volume of $32.3 million in 2014 consisted of $10.5 million for two tank barges and one pushboat, $6.5 million for 13 new hopper barges and $15.3 million of incremental investment in an RRPF affiliate.

Investment volume of $170.5 million in 2013 consisted of a $101.3 million contribution to the Singco and Somargas joint ventures primarily to satisfy our share of the affiliates' debt, $47.9 million for marine vessels and equipment, $14.2 million for investments in loans for dry bulk vessels, and $7.1 million for investments in container assets.

OTHER

Other is comprised of selling, general and administrative expenses (“SG&A”), unallocated interest expense, and miscellaneous income and expense not directly associated with the reporting segments and eliminations.

The following table shows components of other for the years ended December 31 (in millions):

	2015		2014		2013
Selling, general and administrative expense	$	192.4	$	189.2	$	178.3
Unallocated interest expense, net	5.3		5.4		3.8
Other expense (income) (including eliminations)	1.1		1.6		(1.1		)

SG&A, Unallocated Interest and Other

In 2015, SG&A of $192.4 million increased $3.2 million from 2014. The increase was primarily due to $9.0 million of expense associated with an early retirement program offered to certain employees in 2015, partially offset by lower compensation expense in 2015 and costs associated with the closure of our San Francisco office recognized in 2014.

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In 2014, SG&A of $189.2 million increased $10.9 million from 2013. The increase includes an accrual for costs associated with the closure of our San Francisco office in early 2015, which impacted approximately 35 employees through workforce reductions or relocation. In addition, SG&A was negatively impacted by the impairment of an IT project, higher compensation expenses, information technology expenses, and increased group insurance costs.

Unallocated interest expense (the difference between external interest expense and amounts allocated to the reporting segments in accordance with assigned leverage targets) in any year is affected by our consolidated leverage position as well as the timing of debt issuances and investing activities.

Other expense and eliminations were immaterial in each of 2015, 2014, and 2013.

Consolidated Income Taxes

See "Note 14. Income Taxes" in Part II, Item 8 of this Form 10-K.

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BALANCE SHEET DISCUSSION

Assets

Total assets (including on- and off-balance sheet) were $7.4 billion at December 31, 2015, compared to $7.5 billion at December 31, 2014. The decrease was driven by the sales of marine investments at Portfolio Management and the repayment of the note received as part of the AAE sale, partially offset by an increase in Rail North America operating assets. In addition to the assets we recorded on our balance sheet, we utilized off-balance sheet assets, primarily railcars, which we leased in pursuant to operating lease agreements. The off-balance sheet assets represent the estimated present value of our committed future operating lease payments.

The following table shows on- and off-balance sheet assets by segment as of December 31 (in millions):

	2015						2014
	On-Balance Sheet		Off-Balance Sheet		Total		On-Balance Sheet		Off-Balance Sheet		Total
Rail North America	$	4,629.1	$	488.7	$	5,117.8	$	4,358.2	$	606.1	$	4,964.3
Rail International	1,117.6		—		1,117.6		1,228.8		—		1,228.8
ASC	284.7		6.8		291.5		286.7		11.7		298.4
Portfolio Management	636.5		—		636.5		813.3		—		813.3
Other	226.3		—		226.3		232.9		—		232.9
	$	6,894.2	$	495.5	$	7,389.7	$	6,919.9	$	617.8	$	7,537.7

Gross Receivables

Receivables of $245.8 million at December 31, 2015 decreased $112.2 million from December 31, 2014, primarily due to the repayment of a note received as part of the AAE sale.

Allowance for Losses

As of December 31, 2015, general allowances for trade receivables were $6.3 million, or 9.1% of rent and other receivables, compared to $4.5 million, or 5.2%, at December 31, 2014. At December 31, 2015, specific allowances for finance leases were $4.0 million compared to $1.2 million at December 31, 2014. The specific allowance increase in 2015 was related to a loss reserve recorded in connection with one investment at Portfolio Management.

See "Note 19. Allowance for Losses" in Part II, Item 8 of this Form 10-K.

Operating Assets and Facilities

Net operating assets and facilities increased $10.4 million from 2014. The increase was primarily due to new investments of $674.5 million and purchase of leased-in assets of $118.4 million. These increases were offset by depreciation expense of $295.4 million, dispositions of $202.2 million, the reclassification of $197.7 million of assets to assets held-for-sale, primarily related to our planned exit of the majority of our Portfolio Management marine assets, and foreign exchange rate effects of $101.8 million.

Investments in Affiliated Companies

Investments in affiliated companies decreased $9.2 million in 2015 (see table below). The decrease at Rail North America was largely due to a loan payment from an affiliate. The decrease at Portfolio Management was driven by the sale of our 50% interest in the Cardinal Marine joint venture, offset by operating results of RRPF, as well as an investment in a newly created RRPF joint venture entity.

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The following table shows our investments in affiliated companies by segment as of December 31 (in millions):

	2015		2014
Rail North America	$	12.0	$	17.2
Rail International	1.4		1.8
Portfolio Management	335.1		338.7
	$	348.5	$	357.7

See "Note 7. Investments in Affiliated Companies" in Part II, Item 8 of this Form 10-K.

Goodwill

In 2015 and 2014, changes in the balance of our goodwill, all of which are attributable to the Rail North America and Rail International segments, resulted from changes in foreign currency exchange rates. We tested our goodwill for impairment in the fourth quarter of 2015 and no impairment was indicated.

See "Note 18. Goodwill" in Part II, Item 8 of this Form 10-K.

Debt

Total debt decreased $52.4 million from the prior year, primarily due to net repayments of commercial paper and credit facilities of $64.5 million and the effects of foreign exchange on outstanding long-term debt balances, partially offset by a net increase in long-term debt and capital lease principal amounts. During 2015, issuances of long-term debt of $766.5 million were largely offset by scheduled maturities and principal payments of $726.3 million.

The following table shows the details of our long-term debt issuances in 2015 ($ in millions):

Type of Debt	Term	Interest Rate	Principal Amount
Recourse Unsecured	10.2 Years	3.25% Fixed	$	300.0
Recourse Unsecured	30.2 Years	4.50% Fixed	250.0
Recourse Unsecured	5.2 Years	2.60% Fixed	100.0
Recourse Unsecured	10.0 Years	1.84% Floating (1)	60.0
Recourse Unsecured	3.9 Years	1.20% Fixed	56.5
			$	766.5

________

(1) Floating interest rate at December 31, 2015.

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The following table shows the carrying value of our debt obligations by major component, including off-balance sheet debt, as of December 31, 2015 (in millions):

	Secured		Unsecured		Total
Commercial paper and borrowings under bank credit facilities	$	—	$	7.4	$	7.4
Recourse debt	—		4,171.5		4,171.5
Nonrecourse debt	6.9		—		6.9
Capital lease obligations	18.4		—		18.4
Balance sheet debt	25.3		4,178.9		4,204.2
Recourse off-balance sheet debt (1)	495.5		—		495.5
	$	520.8	$	4,178.9	$	4,699.7

________

(1) Off-balance sheet debt represents the estimated present value of committed operating lease payments and is equal to the amount reported as off-balance sheet assets.

See "Note 9. Debt" in Part II, Item 8 of this Form 10-K.

Equity

Total equity decreased $33.8 million from the prior year, primarily due to $125.4 million of stock repurchases, $68.0 million of dividends paid, $55.8 million of foreign currency translation adjustments due to the balance sheet effects of a stronger US dollar, and $2.4 million from changes in the fair value of derivative instruments and other securities. These decreases were partially offset by net income of $205.3 million, $7.8 million from the effects of post-retirement benefit plan adjustments, and $4.7 million from the effects of share-based compensation.

See "Note 21. Shareholders’ Equity" in Part II, Item 8 of this Form 10-K.

CASH FLOW DISCUSSION

We generate a significant amount of cash from operating activities and from our investment portfolio. We also access domestic and international capital markets by issuing unsecured or secured debt and commercial paper. We use these sources of cash, along with our available cash balances, to fulfill our debt, lease, and dividend obligations and to fund portfolio investments and capital additions. We primarily use cash from operations and commercial paper issuances to fund daily operations.

The timing of asset dispositions and changes in working capital impact cash flows from operations and portfolio proceeds. As a result, these cash flow components may vary materially from quarter to quarter and year to year. As of December 31, 2015, we had unrestricted cash balances of $202.4 million.

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The following table shows our principal sources and uses of cash for the years ended December 31 (in millions):

	2015			2014			2013
Principal sources of cash
Net cash provided by operating activities	$	534.3		$	449.2		$	400.7
Portfolio proceeds	482.2			264.0			385.3
Other asset sales	18.7			26.9			32.3
Proceeds from sale-leasebacks	—			—			90.7
Proceeds from issuance of debt, commercial paper, and credit facilities	748.8			1,273.0			1,132.2
	$	1,784.0		$	2,013.1		$	2,041.2
Principal uses of cash
Portfolio investments and capital additions	$	(696.9	)	$	(1,030.5	)	$	(859.6	)
Repayments of debt, commercial paper, and credit facilities	(790.8		)	(819.8		)	(854.1		)
Purchases of leased-in assets	(118.4		)	(150.5		)	(61.4		)
Payments on capital lease obligations	(2.7		)	(2.6		)	(2.4		)
Stock repurchases	(125.4		)	(124.6		)	(68.6		)
Cash dividends	(68.2		)	(62.0		)	(60.5		)
	$	(1,802.4	)	$	(2,190.0	)	$	(1,906.6	)

Net Cash Provided by Operating Activities

Net cash provided by operating activities of $534.3 million increased $85.1 million compared to 2014. The increase was driven by higher lease revenue and lower maintenance expense, partially offset by lower distributions from joint ventures, as well as the net impact of changes in the balances of certain working capital items.

Portfolio Investments and Capital Additions

Portfolio investments and capital additions primarily consist of purchases of operating assets, investments in affiliates, and capitalized asset improvements. Portfolio investments and capital additions of $696.9 million decreased $333.6 million compared to 2014. 2014 investments included Rail North America's purchase of approximately 18,500 boxcars for approximately $340 million. The increase in 2014 compared to 2013 was primarily due to the purchase of boxcars noted above, partially offset by Portfolio Management's $101.3 million contribution to the Singco and Somargas joint ventures in 2013. The timing of investments depends on purchase commitments, transaction opportunities, and market conditions.

The following table shows portfolio investments and capital additions by segment for the years ended December 31 (in millions):

	2015		2014		2013
Rail North America (1)	$	506.7	$	810.6	$	502.4
Rail International	148.0		163.6		168.5
ASC	20.3		18.4		11.2
Portfolio Management (2)	18.4		32.3		170.5
Other	3.5		5.6		7.0
	$	696.9	$	1,030.5	$	859.6

__________________

(1) 2014 investment volume includes approximately $340 million related to the purchase of approximately 18,500 boxcars in 2014.

(2) Portfolio Management’s investment volume includes $101.3 million related to the Singco and Somargas dissolution in 2013.

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Portfolio Proceeds

Portfolio proceeds primarily consist of loan and finance lease receipts, proceeds from sales of operating assets, proceeds from sales of securities, and capital distributions from affiliates. In 2015, AAE repaid its outstanding loan principal in the amount of €67.5 million ($76.4 million). In addition, portfolio proceeds in 2015 included $124.4 million from the sales of marine investments as part of our decision to exit the majority of the marine assets at our Portfolio Management segment. The decrease in proceeds in 2014 was primarily due to the absence of proceeds from the sale of our interest in AAE in 2013 and lower proceeds from sales of operating assets.

The following table shows portfolio proceeds for the years ended December 31 (in millions):

	2015		2014		2013
Finance lease rents received, net of earned income and leveraged lease nonrecourse debt service	$	11.2	$	12.5	$	16.6
Loan principal received	82.7		14.9		13.5
Proceeds from sales of operating assets	357.8		202.1		285.9
Capital distributions from affiliates	29.8		33.6		68.1
Other portfolio proceeds	0.7		0.9		1.2
	$	482.2	$	264.0	$	385.3

Other Investing Activity

Rail North America acquired 5,004 railcars in 2015, 4,560 railcars in 2014, and 2,967 railcars in 2013 that were previously on operating leases. Proceeds from sales of other assets for all periods were primarily related to railcar scrapping. Rail North America completed sale-leasebacks for 710 railcars in 2013.

Our restricted cash is primarily contractually required cash amounts we maintain for two wholly owned bankruptcy-remote, special purpose corporations. The special purpose corporations were formed in prior years to finance railcars on a structured, nonrecourse basis. Changes in restricted cash largely represent the net change in the cash we maintain for the special purpose corporations that result from their operating and financing activities. We expect our contributions to restricted cash to limit payment shortfalls in the future, thus preventing interest and penalties that might otherwise be incurred under the terms of the applicable financing arrangements.

The following table shows other investing activity for the years ended December 31 (in millions):

	2015			2014			2013
Purchases of leased-in assets	$	(118.4	)	$	(150.5	)	$	(61.4	)
Proceeds from sales of other assets	18.7			26.9			32.3
Proceeds from sale-leasebacks	—			—			90.7
Net increase (decrease) in restricted cash	(2.9		)	5.8			9.5
Other	9.7			5.8			—
	$	(92.9	)	$	(112.0	)	$	71.1

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Net Cash (used in) provided by Financing Activities

The following table shows net cash (used in) provided by financing activities for the years ended December 31 (in millions):

	2015			2014			2013
Net proceeds from issuances of debt (original maturities longer than 90 days)	$	748.8		$	1,223.0		$	1,132.2
Repayments of debt (original maturities longer than 90 days)	(726.3		)	(819.8		)	(602.8		)
Net increase (decrease) in debt with original maturities of 90 days or less	(64.5		)	50.0			(251.3		)
Payments on capital lease obligations	(2.7		)	(2.6		)	(2.4		)
Stock repurchases (1)	(125.4		)	(124.6		)	(68.6		)
Cash dividends	(68.2		)	(62.0		)	(60.5		)
Other	9.3			(1.8		)	2.5
	$	(229.0	)	$	262.2		$	149.1

________

(1) During 2015, we repurchased 2.4 million shares of common stock for $125.4 million, which completed our $250 million repurchase program authorized in 2014. In 2014, we repurchased 1.9 million shares of common stock for $124.6 million. In 2013, we repurchased 1.4 million shares of common stock for $68.6 million, which completed a separate repurchase program that was authorized in 2008.

LIQUIDITY AND CAPITAL RESOURCES

General

We fund our investments and meet our debt, lease, and dividend obligations using our available cash balances, as well as cash generated from operating activities, sales of assets, commercial paper issuances, committed revolving credit facilities, distributions from affiliates, and issuances of secured and unsecured debt. We primarily use cash from operations and commercial paper issuances to fund daily operations. We use both domestic and international capital markets and banks to meet our debt financing needs.

Contractual and Other Commercial Commitments

The following table shows our contractual commitments, including debt principal payments, lease payments, and purchase commitments at December 31, 2015 (in millions):

	Payments Due by Period
	Total		2016		2017		2018		2019		2020		Thereafter
Recourse debt	$	4,198.5	$	557.9	$	412.7	$	517.9	$	550.0	$	350.0	$	1,810.0
Nonrecourse debt	6.9		6.9		—		—		—		—		—
Commercial paper and credit facilities	7.4		7.4		—		—		—		—		—
Capital lease obligations	20.2		4.3		2.8		1.6		11.5		—		—
Recourse operating leases	656.3		85.1		91.7		83.0		79.8		72.7		244.0
Purchase commitments (1)	1,735.2		575.0		379.9		318.4		339.8		122.1		—
	$	6,624.5	$	1,236.6	$	887.1	$	920.9	$	981.1	$	544.8	$	2,054.0

__________

(1) Primarily railcar purchase commitments. The amounts shown for all years are based on management's estimates of the timing, anticipated car types and related costs of railcars to be purchased under its agreements. The amount shown for 2016 includes $89.2 million related to options we exercised to purchase 2,623 railcars that are currently on lease. In addition, the amount shown for 2017 includes $24.0 million related to an option we exercised to purchase a vessel that is currently on lease.

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In 2014, we entered into a long-term supply agreement with Trinity that will take effect upon the scheduled expiration of the current railcar supply agreement in 2016. Under the terms of the agreement, we will purchase up to 8,950 newly built railcars over a four-year period from March, 2016 through March, 2020. We may order either tank or freight cars; however, we expect that the majority of the order will be for tank cars. Except to the extent the parties otherwise agree, railcar pricing will be on an agreed upon, or cost-plus, basis subject to certain specified adjustments and surcharges throughout the term of the agreement. In addition, in January, 2017, either party may initiate a review of the cost-plus basis pricing if it is not reflective of then-current market prices. If the parties cannot agree on revised cost-plus pricing (or otherwise agree that no changes are necessary), either party may, at its election, deliver to the other party a notice of its intent to terminate, and in such case, the agreement will automatically terminate 30 days thereafter, unless the non-terminating party agrees to a specified revised margin as set forth in the agreement.

The following table shows our contractual cash receipts arising from future lease payments from finance leases, future rental receipts from noncancelable operating leases, and future payments on loans as of December 31, 2015 (in millions):

	Contractual Cash Receipts by Period
	Total		2016		2017		2018		2019		2020		Thereafter
Finance leases	$	199.6	$	28.3	$	25.9	$	23.9	$	22.6	$	21.1	$	77.8
Operating leases	4,392.6		970.3		815.1		684.3		568.1		442.6		912.2
Loans	8.8		2.0		2.0		4.2		0.1		0.1		0.4
Total	$	4,601.0	$	1,000.6	$	843.0	$	712.4	$	590.8	$	463.8	$	990.4

Our future contractual cash receipts at December 31, 2015 increased $446.0 million compared to 2014, primarily as a result of growing our committed lease receipts by raising rates and extending term. This increase in contractual cash receipts was net of lease receipts in 2015 and the repayment of the AAE loan.

2016 Liquidity Outlook

We plan to meet our contractual obligations for 2016 using our available cash at December 31, 2015, as well as a combination of cash we expect to receive from operations, portfolio proceeds, long-term debt issuances, and our revolving credit facilities. Additionally, we anticipate that portfolio investments in 2016 will likely exceed contractual commitments as we expect to exercise options to purchase railcars that are currently on lease and opportunistically pursue other strategic investments. However, changes in the economic environment or capital markets could adversely impact our liquidity position, and we cannot provide assurance that our sources of cash will be adequate to fund our operations and contractual commitments.

Short-Term Borrowings

We primarily use short-term borrowings as a source of working capital and to temporarily fund differences between our operating cash flows and portfolio proceeds, and our capital investments and debt maturities. We do not maintain or target any particular level of short-term borrowings on a permanent basis. Rather, we will temporarily utilize short-term borrowings at levels we deem appropriate until we decide to pay down these balances using proceeds from a long-term debt issuance.

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The following table shows additional information regarding our short-term borrowings:

	North America (1)									Europe (2)
	2015			2014			2013			2015			2014			2013
Balance as of December 31 (in millions)	$	—		$	69.0		$	—		$	7.4		$	3.1		$	23.6
Weighted average interest rate	—		%	0.6		%	—		%	0.9		%	1.5		%	1.3		%
Euro/Dollar exchange rate	n/a			n/a			n/a			1.09			1.21			1.37
Average daily amount outstanding during year (in millions)	$	5.7		$	41.9		$	19.3		$	5.5		$	17.4		$	28.5
Weighted average interest rate	0.5		%	0.3		%	0.4		%	1.1		%	1.1		%	1.0		%
Average Euro/Dollar exchange rate	n/a			n/a			n/a			1.11			1.33			1.33
Average daily amount outstanding during 4th quarter (in millions)	$	—		$	19.4		$	—		$	5.2		$	8.4		$	17.5
Weighted average interest rate	—		%	0.4		%	—		%	1.1		%	1.1		%	1.1		%
Average Euro/Dollar exchange rate	n/a			n/a			n/a			1.10			1.25			1.36
Maximum daily amount outstanding (in millions)	$	69.0		$	162.0		$	185.0		$	75.5		$	49.8		$	147.1
Euro/Dollar exchange rate	n/a			n/a			n/a			1.06			1.36			1.37

__________

(1) Short-term borrowings in North America are comprised of commercial paper issued in the US.

(2) Short-term borrowings in Europe are comprised of borrowings under bank credit facilities.

In 2013, we entered into a new $575 million 5-year unsecured revolving credit facility in the US. In 2015, we exercised an option to extend the maturity date of our revolving credit facility by one year, to April 2020. As of December 31, 2015, the full $575 million was available under the facility.

Restrictive Covenants

Our credit facility and certain other debt agreements contain various restrictive covenants. See "Note 9. Debt" in Part II, Item 8 of this Form 10-K.

Credit Ratings

The global capital market environment and outlook may affect our funding options and our financial performance. Our access to capital markets at competitive rates depends on our credit rating and rating outlook, as determined by rating agencies. As of December 31, 2015, our long-term unsecured debt was rated BBB by Standard & Poor's and Baa2 by Moody’s Investor Service and our short-term unsecured debt was rated A-2 by Standard & Poor's and P-2 by Moody’s Investor Service. Our rating outlook from both agencies was stable.

Shelf Registration Statement

During 2013, we filed a shelf registration statement that enables us to issue debt securities and pass-through certificates. The registration statement is effective for three years and does not limit the amount of debt securities and pass-through certificates we can issue.

Commercial Commitments

We have entered into various commercial commitments, such as guarantees and standby letters of credit, related to certain transactions. These commercial commitments require us to fulfill specific obligations in the event of third-party demands. Similar to our balance sheet investments, these commitments expose us to credit, market, and equipment risk. Accordingly, we evaluate these commitments and other contingent obligations using techniques similar to those we use to evaluate funded transactions.

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The following table shows our commercial commitments at December 31, 2015 (in millions):

	Amount of Commitment Expiration by Period
	Total		2016		2017		2018		2019		2020		Thereafter
Lease payment guarantees	$	22.1	$	7.1	$	10.1	$	2.8	$	2.1	$	—	$	—
Standby letters of credit and performance bonds	8.9		8.9		—		—		—		—		—
	$	31.0	$	16.0	$	10.1	$	2.8	$	2.1	$	—	$	—

Lease payment guarantees are commitments to financial institutions to make lease payments for a third party in the event they default. We reduce any liability that may result from these guarantees by the value of the underlying asset or group of assets.

We are also parties to standby letters of credit and performance bonds, which primarily relate to contractual obligations and general liability insurance coverages. No material claims have been made against these obligations, and no material losses are anticipated.

Defined Benefit Plan Contributions

In 2015, we contributed $5.8 million to our defined benefit pension plans and other post-retirement benefit plans. In 2016, we expect to contribute approximately $6.4 million. As of December 31, 2015, our funded pension plans were 95% funded in aggregate. Additional contributions will depend primarily on plan asset investment returns and actuarial experience, and subject to the impact of these factors, we may make additional material plan contributions.

Separately, the shipboard personnel at ASC participate in various multiemployer benefit plans that provide pension, health care, and post-retirement and other benefits to active and retired employees. We contributed $8.2 million to these plans in 2015 and recognized that amount as marine operating expense. We expect our 2016 contributions to approximate 2015 amounts, but our contributions will ultimately depend on the number of vessels deployed and crew hours worked during the year.

See "Note 12. Pension and Other Post-Retirement Benefits" in Part II, Item 8 of this Form 10-K for additional information on our benefit plans.

GATX Common and Preferred Stock Repurchases

In 2015, we repurchased 2.4 million shares for $125.4 million under this repurchase program, which completed our $250 million repurchase authorization approved in 2014. In 2014, we repurchased 1.9 million shares for $124.6 million. In 2013, we purchased 1.4 million shares for $68.6 million, which completed a separate repurchase program that was authorized in 2008. Subsequent to December 31, 2015, our board of directors authorized a new $300 million stock repurchase program. The timing of share repurchases will be dependent on market conditions and other factors.

In 2013, we either converted or redeemed all 15,567 outstanding shares of our $2.50 cumulative convertible preferred stock.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

We prepare our consolidated financial statements in conformity with GAAP, which requires us to use judgment in making estimates and assumptions that affect reported amounts of assets, liabilities, revenues, and expenses, as well as information in the related disclosures. We regularly evaluate our estimates and judgments based on historical experience, market indicators, and other relevant factors and circumstances. Actual results may differ from these estimates under different assumptions or conditions.

Operating Assets

We state operating assets, including assets acquired under capital leases, at cost and depreciate them over their estimated economic useful lives to an estimated residual value using the straight-line method. We determine the economic useful life based on our estimate of the period over which the asset will generate revenue. For the majority of our operating assets, the economic useful life is greater than

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thirty years. The residual values are based on historical experience and economic factors. We periodically review the appropriateness of our estimates of useful lives and residual values based on changes in economic circumstances and other factors. Changes in these estimates would result in a change in future depreciation expense.

In addition, we review long-lived assets, such as operating assets and facilities, for impairment whenever circumstances indicate that the carrying amount of these assets may not be recoverable. We measure the recoverability of assets we expect to hold and use by comparing the carrying amount of an asset to its estimated future net cash flows. We base estimated future cash flows on a number of assumptions, including lease rates, lease term (including renewals), freight rates and volume, operating costs, the life of the asset, and final disposition proceeds. If we determine an asset is impaired, we record an impairment loss equal to the excess of the asset’s carrying amount over its estimated fair value. We base our estimates of fair value on discounted future cash flows, and supplement those estimates with independent appraisals and market comparables when available.

Lease Classification

We analyze all new and modified leases to determine whether we should classify the lease as an operating or capital lease. Our lease classification analysis relies on certain assumptions that require significant judgment, such as the asset's fair value, the asset's estimated residual value, the interest rate implicit in the lease, and the asset's economic useful life. While most of our leases are classified as operating leases, changes in the assumptions we use could result in a different lease classification, which would change the way the lease transaction impacts our financial position and results of operations. See "Note 5. Leases" in Part II, Item 8 of this Form 10-K.

Impairment of Investments in Affiliated Companies

We review the carrying amount of our investments in affiliates annually, or whenever circumstances indicate that their value may have declined. If management determines that indicators of impairment are present for an investment, we perform an analysis to estimate the fair value of that investment. Active markets do not typically exist for our affiliate investments and as a result, we may estimate fair value using discounted cash flow analysis at the investee level, price-earnings ratios based on comparable businesses, or other valuation techniques that are appropriate for the particular circumstances of the affiliate. For all fair value estimates, we use observable inputs whenever possible and appropriate.

Once we make an estimate of fair value, we compare the estimate of fair value to the investment’s carrying value. If the investment’s estimated fair value is less than its carrying value, then we consider the investment impaired. If an investment is impaired, we assess whether the impairment is other-than-temporary. We consider factors such as the expected operating results for the investment's near future, the length of the economic life cycle of the underlying assets of the investee, and our ability to hold the investment through the end of the underlying assets’ useful life to determine if the impairment is other-than-temporary. We may also consider actions we anticipate the investee will take to improve its business prospects if it seems probable the investee will take those actions. If we determine an investment to be only temporarily impaired, we do not record an impairment loss. Alternatively, if we determine an impairment is other-than-temporary, we record a loss equal to the difference between the estimated fair value of the investment and its carrying value. See "Note 7. Investments in Affiliated Companies" and "Note 11. Asset Impairments" in Part II, Item 8 of this Form 10-K.

Impairment of Goodwill

We review the carrying amount of our goodwill annually or in interim periods if circumstances indicate an impairment may have occurred. We perform the impairment review at the reporting unit level, which is one level below an operating segment. The goodwill impairment test is a two-step process and requires us to make certain judgments to determine the assumptions we use in the calculation. The first step requires us to estimate the fair value of each reporting unit, which we determine using a discounted cash flow model. We base our estimates of the future cash flows on revenue and expense forecasts and include assumptions for future growth. When estimating the fair value of the reporting unit, we also consider observable multiples of book value and earnings for companies that we believe are comparable to the applicable reporting units. We then compare our estimate of the fair value of the reporting unit with the reporting unit’s carrying amount, which includes goodwill. If the estimated fair value is less than the carrying amount, we compare the implied fair value of the reporting unit’s goodwill with the carrying amount of the goodwill. If the carrying amount of the goodwill exceeds its implied fair value, we record an impairment loss for the amount the carrying amount of the goodwill exceeds its implied fair value. See "Note 18. Goodwill" in Part II, Item 8 of this Form 10-K.

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Pension and Post-Retirement Benefits Assumptions

We use actuarial assumptions to calculate pension and other post-retirement benefit obligations and related costs. The discount rate and the expected return on plan assets are two critical assumptions that influence the plan expense and liability measurement. Other assumptions involve demographic factors such as expected retirement age, mortality, employee turnover, health care cost trends, and the rate of compensation increases.

We use the discount rate to calculate the present value of expected future pension and post-retirement cash flows as of the measurement date. The discount rate is based on yields for high-quality, long-term bonds with durations similar to the projected benefit obligation. We base the expected long-term rate of return on plan assets on current and expected asset allocations, as well as historical and expected returns on various categories of plan assets. We evaluate these critical assumptions annually and make adjustments as required in accordance with changes in underlying market conditions, valuation of plan assets, or demographics. Changes in these assumptions may increase or decrease periodic benefit plan expense as well as the carrying value of benefit plan obligations.

See "Note 12. Pension and Other Post-Retirement Benefits" in Part II, Item 8 of this Form 10-K for additional information regarding these assumptions.

Share-Based Compensation

We grant equity awards to certain employees and non-employee directors in the form of stock appreciation rights, restricted stock, performance shares, and phantom stock. We recognize compensation expense for these awards on a pro-rata basis over the applicable vesting period based on the award’s grant date fair value. We use the Black-Scholes options valuation model to calculate the grant date fair value of stock appreciation rights. This model requires us to make certain assumptions, some of which are highly subjective, that affect the amount of compensation expense we will record. The assumptions we use in the model include the expected stock price volatility (based on the historical volatility of our stock price), the risk-free interest rate (based on the treasury yield curve), the expected life of the equity award (based on historical exercise patterns and post-vesting termination behavior), and the dividend equivalents we expect to pay during the estimated life of the equity award since our stock appreciation rights are dividend participating. We base the fair value of other equity awards on our stock price on the grant date.

See "Note 13. Share-Based Compensation" in Part II, Item 8 of this Form 10-K.

Income Taxes

Our operations are subject to taxes in the US, various states, and foreign countries, and as result, we may be subject to audit in all of these jurisdictions. Tax audits may involve complex issues and disagreements with taxing authorities that could require several years to resolve. GAAP requires that we presume the relevant tax authority will examine uncertain income tax positions. We must determine whether, based on the technical merits of our position, it is more likely than not that our uncertain income tax positions will be sustained by taxing authorities upon examination, which may include related appeals or litigation processes. We must then evaluate income tax positions that meet the more likely than not recognition threshold to determine the probable amount of benefit we would recognize in the financial statements. Establishing accruals for uncertain tax benefits requires us to make estimates and assessments with respect to the ultimate outcome of tax audit issues for amounts recorded in the financial statements. The ultimate resolution of uncertain tax benefits may differ from our estimate, potentially impacting our financial position, results of operations, or cash flows.

We evaluate the need for a deferred tax asset valuation allowance by assessing the likelihood we will realize deferred tax assets, including net operating loss and tax credit carryforward benefits, in the future. Our assessment of whether a valuation allowance is required involves judgment, including forecasting future taxable income and evaluating tax planning initiatives, if applicable.

Our tax provision does not include taxes on undistributed earnings of foreign subsidiaries as we intend to permanently reinvest such earnings in those foreign operations. If, in the future, these earnings are repatriated to the US, or if we expect such earnings to be repatriated, a provision for additional taxes may be required.

See "Note 14. Income Taxes" in Part II, Item 8 of this Form 10-K for additional information on income taxes.

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NEW ACCOUNTING PRONOUNCEMENTS

See "Note 2. Accounting Changes" in Part II, Item 8 of this Form 10-K for a summary of new accounting pronouncements that may impact our business.

NON-GAAP FINANCIAL MEASURES

We compute certain financial measures using non-GAAP components, as defined by the SEC. These measures are not in accordance with, or a substitute for, GAAP and our financial measures may be different from non-GAAP financial measures used by other companies.

We have provided a reconciliation of our non-GAAP components to the most directly comparable GAAP components. We include these non-GAAP financial measures to provide additional information and insight into our operating results and financial position. We use these measures in analyzing our financial performance from period to period and when making compensation decisions.

Reconciliation of Non-GAAP Components used in the Computation of Certain Financial Measures

Balance Sheet Measures

We disclose total on- and off-balance sheet assets because a portion of our North American railcar fleet has been financed through sale-leasebacks that are accounted for as operating leases and the assets are not recorded on the balance sheet. Additionally, ASC utilizes a tug and barge unit that is accounted for as an operating lease and the assets are not recorded on the balance sheet. We believe this information provides investors with a better representation of the assets deployed in our businesses.

The following table shows total on- and off-balance sheet assets (in millions):

	2015		2014		2013		2012		2011
Consolidated on-balance sheet assets	$	6,894.2	$	6,919.9	$	6,535.5	$	6,044.7	$	5,846.0
Off-balance sheet assets:
Rail North America	488.7		606.1		887.9		863.5		884.5
ASC	6.8		11.7		16.5		21.0		—
Portfolio Management	—		—		—		—		2.6
Total On- and Off-Balance Sheet Assets	$	7,389.7	$	7,537.7	$	7,439.9	$	6,929.2	$	6,733.1
Shareholders’ Equity	$	1,280.2	$	1,314.0	$	1,397.0	$	1,244.2	$	1,127.3

Net Income Measures

We exclude the effects of tax adjustments and other items when we present return on equity, net income, and diluted earnings per share. We exclude these items to provide a more meaningful comparison of financial performance between years and to provide transparency in our operating results.

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The following tables show our net income and diluted earnings per share excluding tax adjustments and other items for the years ended December 31 (in millions, except per share data):

Impact of Tax Adjustments and Other Items on Net Income:
	2015			2014		2013			2012			2011
Net income	$	205.3		$	205.0	$	169.3		$	137.3		$	110.8
Adjustments attributable to consolidated income:
Net loss on wholly owned Portfolio Management marine investments, net of tax (1)	5.7			—		—			—			—
Early retirement program, net of tax (2)	5.6			—		—			—			—
Income tax rate changes (3)	14.1			—		—			0.7			—
GATX income taxes on sale of AAE (4)	—			—		23.2			—			—
Foreign tax credit carryforward (5)	—			—		(3.9		)	(4.6		)	—
Tax benefits upon close of tax audits	—			—		—			(15.5		)	(4.8		)
Litigation recoveries, no tax effect (6)	—			—		—			—			(3.2		)
Leveraged lease adjustment, net of tax (7)	—			—		—			—			(3.5		)
Adjustments attributable to affiliates' earnings:
Impairment loss on Portfolio Management affiliate (1)	11.9			—		—			—			—
Income tax rate changes (8)	(7.7		)	—		(7.6		)	(4.6		)	(4.1		)
Pretax gain on sale of AAE (4)	—			—		(9.3		)	—			—
Interest rate swaps at AAE, net of taxes (9)	—			—		(6.9		)	20.5			(0.2		)
Net income, excluding tax adjustments and other items	$	234.9		$	205.0	$	164.8		$	133.8		$	95.0

Impact of Tax Adjustments and Other Items on Diluted Earnings per Share:
	2015			2014		2013			2012			2011
Diluted earnings per share	$	4.69		$	4.48	$	3.59		$	2.88		$	2.35
Adjustments attributable to consolidated income:
Net loss on wholly owned Portfolio Management marine investments, net of tax (1)	0.13			—		—			—			—
Early retirement program, net of tax (2)	0.13			—		—			—			—
Income tax rate changes (3)	0.32			—		—			0.01			—
GATX income taxes on sale of AAE (4)	—			—		0.50			—			—
Foreign tax credit carryforward (5)	—			—		(0.08		)	(0.09		)	—
Tax benefits upon close of tax audits	—			—		—			(0.33		)	(0.10		)
Litigation recoveries, no tax effect (6)	—			—		—			—			(0.07		)
Leveraged lease adjustment, net of tax (7)	—			—		—			—			(0.08		)
Adjustments attributable to affiliates' earnings:
Impairment loss on Portfolio Management affiliate (1)	0.27			—		—			—			—
Income tax rate changes (8)	(0.18		)	—		(0.16		)	(0.09		)	(0.09		)
Pretax gain on sale of AAE (4)	—			—		(0.20		)	—			—
Interest rate swaps at AAE, net of taxes (9)	—			—		(0.15		)	0.43			—
Diluted earnings per share, excluding tax adjustments and other items*	$	5.37		$	4.48	$	3.50		$	2.81		$	2.01

* Sum of individual components may not be additive, due to rounding.

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________

(1) In 2015, we made the decision to exit the majority of our non-core, marine investments within our Portfolio Management segment. As a result, we recorded losses and gains associated with the impairments and sales of certain investments.

(2) Expenses associated with an early retirement program offered to certain eligible employees.

(3) Deferred income tax adjustment attributable to an increase of our effective state income tax rate in 2015 and a deferred income tax adjustment due to an enacted statutory rate increase in Ontario in 2012.

(4) Aggregate after-tax impact of the AAE sale, including the $3.9 million foreign credit carryforward, was a net loss of $10.0 million.

(5) Benefits attributable to the utilization of foreign tax credit carryforwards.

(6) Accrual reversals resulting from the favorable resolution of litigation matters.

(7) Income on a leveraged lease adjustment.

(8) Deferred income tax adjustments due to enacted statutory rate decreases in the United Kingdom for each of 2015, 2013, 2012, and 2011.

(9) Realized and/or unrealized gains/losses on AAE interest rate swaps.

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Item 7A.  Quantitative and Qualitative Disclosures About Market Risk

In the normal course of business, we are exposed to interest rate and foreign currency exchange rate risks that could impact our financial results. To manage these risks we may enter into certain derivative transactions, principally interest rate swaps, Treasury rate locks, options and currency forwards and swaps. These instruments and other derivatives are entered into only for hedging existing underlying exposures. We do not hold or issue derivative financial instruments for speculative purposes.

Interest Rate Exposure — Our reported interest expense is affected by changes in interest rates, primarily LIBOR, as a result of the issuance of floating rate debt instruments. We generally manage the amount of floating rate debt instruments in relation to our floating rate investments. Based on our floating rate debt instruments at December 31, 2015, and giving effect to related derivatives, a hypothetical increase in market interest rates of 100 basis points would cause an increase in after-tax interest expense of $5.2 million in 2016. Comparatively, at December 31, 2014, a hypothetical 100 basis point increase in interest rates would have resulted in a $8.0 million increase in after-tax interest expense in 2015. Our earnings are also exposed to interest rate changes from affiliates' earnings. Certain affiliates issue floating rate debt instruments to finance their investments.

Foreign Currency Exchange Rate Exposure — Certain of our foreign subsidiaries conduct business in currencies other than the US dollar, principally those operating in Austria, Canada, Germany, and Poland. As a result, we are exposed to foreign currency risk attributable to changes in the exchange value of the US dollar in terms of the euro, Canadian dollar, and Polish zloty. Based on 2015 local currency earnings and considering non-functional currency assets and liabilities recorded as of December 31, 2015, and giving effect to related derivatives, a uniform and hypothetical 10% strengthening in the US dollar versus applicable foreign currencies would decrease after-tax income in 2016 by $2.4 million. Comparatively, based on 2014 local currency earnings and considering non-functional currency assets and liabilities recorded as of December 31, 2014, a uniform and hypothetical 10% strengthening in the US dollar versus applicable foreign currencies would have decreased after-tax income in 2015 by $2.4 million.

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Item 8. Financial Statements and Supplementary Data

Report of Independent Registered Public Accounting Firm on Financial Statements

The Board of Directors and Shareholders of GATX Corporation and subsidiaries

We have audited the accompanying consolidated balance sheets of GATX Corporation and subsidiaries as of December 31, 2015 and 2014, and the related consolidated statements of comprehensive income, changes in shareholders' equity and cash flows for each of the three years in the period ended December 31, 2015. Our audits also included the financial statement schedule listed in the Index at Item 15(a)(2). These financial statements and schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of GATX Corporation and subsidiaries at December 31, 2015 and 2014, and the consolidated results of their operations and their cash flows for each of the three years in the period ended December 31, 2015, in conformity with US generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), GATX Corporation and subsidiaries’ internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 24, 2016, expressed an unqualified opinion thereon.

Chicago, Illinois

February 24, 2016

60

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(In millions, except share data)

	December 31
	2015			2014
Assets
Cash and Cash Equivalents	$	202.4		$	209.9
Restricted Cash	17.3			14.5
Receivables
Rent and other receivables	69.4			86.0
Loans	8.8			97.3
Finance leases	167.6			174.7
Less: allowance for losses	(10.3		)	(5.7		)
	235.5			352.3
Operating Assets and Facilities ($122.9 and $123.1 related to a consolidated VIE)	8,204.0			8,143.5
Less: allowance for depreciation ($39.7 and $35.0 related to a consolidated VIE)	(2,505.6		)	(2,455.5		)
	5,698.4			5,688.0
Investments in Affiliated Companies	348.5			357.7
Goodwill	79.7			86.1
Other Assets	312.4			211.4
Total Assets	$	6,894.2		$	6,919.9
Liabilities and Shareholders’ Equity
Accounts Payable and Accrued Expenses	$	170.9		$	165.9
Debt
Commercial paper and borrowings under bank credit facilities	7.4			72.1
Recourse	4,171.5			4,162.3
Nonrecourse ($6.9 and $15.9 related to a consolidated VIE)	6.9			15.9
Capital lease obligations	18.4			6.3
	4,204.2			4,256.6
Deferred Income Taxes	1,018.3			937.3
Other Liabilities	220.6			246.1
Total Liabilities	5,614.0			5,605.9
Shareholders’ Equity
Common stock, $0.625 par value: Authorized shares — 120,000,000 Issued shares — 66,776,290 and 66,600,984 Outstanding shares — 41,970,098 and 44,198,850	41.5			41.4
Additional paid in capital	677.4			672.8
Retained earnings	1,639.0			1,501.7
Accumulated other comprehensive loss	(198.8		)	(148.4		)
Treasury stock at cost (24,806,192 and 22,402,134 shares)	(878.9		)	(753.5		)
Total Shareholders’ Equity	1,280.2			1,314.0
Total Liabilities and Shareholders’ Equity	$	6,894.2		$	6,919.9

See accompanying notes to consolidated financial statements.

61

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In millions, except per share data)

	Year Ended December 31
	2015			2014			2013
Revenues
Lease revenue	$	1,130.1		$	1,086.6		$	975.2
Marine operating revenue	235.0			286.3			275.1
Other revenue	84.8			78.1			70.7
Total Revenues	1,449.9			1,451.0			1,321.0
Expenses
Maintenance expense	326.1			337.0			294.0
Marine operating expense	155.9			197.8			189.8
Depreciation expense	290.5			273.5			255.0
Operating lease expense	87.2			108.7			129.4
Other operating expense	38.4			28.9			26.1
Selling, general and administrative expense	192.4			189.2			178.3
Total Expenses	1,090.5			1,135.1			1,072.6
Other Income (Expense)
Net gain on asset dispositions	79.2			87.2			85.6
Interest expense, net	(155.1		)	(158.4		)	(166.6		)
Other expense	(13.2		)	(13.5		)	(8.4		)
Income before Income Taxes and Share of Affiliates’ Earnings	270.3			231.2			159.0
Income Taxes	(110.9		)	(75.7		)	(65.5		)
Share of Affiliates’ Earnings, Net of Taxes	45.9			49.5			75.8
Net Income	$	205.3		$	205.0		$	169.3
Other Comprehensive Income, Net of Taxes
Foreign currency translation adjustments	(55.8		)	(79.1		)	25.8
Unrealized (loss) gain on securities	(0.6		)	(0.1		)	0.8
Unrealized (loss) gain on derivative instruments	(1.8		)	3.0			22.4
Post-retirement benefit plans	7.8			(29.5		)	52.9
Other comprehensive (loss) income	(50.4		)	(105.7		)	101.9
Comprehensive Income	$	154.9		$	99.3		$	271.2
Share Data
Basic earnings per share	$	4.76		$	4.55		$	3.64
Average number of common shares	43.1			45.0			46.4
Diluted earnings per share	$	4.69		$	4.48		$	3.59
Average number of common shares and common share equivalents	43.8			45.8			47.1
Dividends declared per common share	$	1.52		$	1.32		$	1.24

See accompanying notes to consolidated financial statements.

62

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In millions)

	Year Ended December 31
	2015			2014			2013
Operating Activities
Net income	$	205.3		$	205.0		$	169.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	303.3			287.0			267.8
Share-based compensation	11.6			14.0			13.1
Asset impairment charges	33.9			1.3			5.9
Net gains on sales of assets	(99.7		)	(79.3		)	(80.7		)
Deferred income taxes	90.2			61.4			53.6
Share of affiliates’ earnings, net of dividends	(13.7		)	(9.5		)	(41.4		)
Change in income taxes payable	7.4			(4.4		)	4.5
Change in accrued operating lease expense	(24.2		)	(5.2		)	(7.7		)
Employee benefit plans	10.6			3.7			7.5
Other	9.6			(24.8		)	8.8
Net cash provided by operating activities	534.3			449.2			400.7
Investing Activities
Additions to operating assets and facilities	(681.4		)	(1,015.2		)	(744.1		)
Loans extended	—			—			(14.2		)
Investments in affiliates	(15.5		)	(15.3		)	(101.3		)
Portfolio investments and capital additions	(696.9		)	(1,030.5		)	(859.6		)
Purchases of leased-in assets	(118.4		)	(150.5		)	(61.4		)
Portfolio proceeds	482.2			264.0			385.3
Proceeds from sales of other assets	18.7			26.9			32.3
Proceeds from sale-leasebacks	—			—			90.7
Net (increase) decrease in restricted cash	(2.9		)	5.8			9.5
Other	9.7			5.8			—
Net cash used in investing activities	(307.6		)	(878.5		)	(403.2		)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	748.8			1,223.0			1,132.2
Repayments of debt (original maturities longer than 90 days)	(726.3		)	(819.8		)	(602.8		)
Net (decrease) increase in debt with original maturities of 90 days or less	(64.5		)	50.0			(251.3		)
Payments on capital lease obligations	(2.7		)	(2.6		)	(2.4		)
Stock repurchases	(125.4		)	(124.6		)	(68.6		)
Dividends	(68.2		)	(62.0		)	(60.5		)
Other	9.3			(1.8		)	2.5
Net cash (used in) provided by financing activities	(229.0		)	262.2			149.1
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(5.2		)	(2.7		)	(1.1		)
Net (decrease) increase in Cash and Cash Equivalents during the year	(7.5		)	(169.8		)	145.5
Cash and Cash Equivalents at beginning of year	209.9			379.7			234.2
Cash and Cash Equivalents at end of year	$	202.4		$	209.9		$	379.7

See accompanying notes to consolidated financial statements.

63

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY

(In millions)

	2015		2015			2014		2014			2013		2013
	Shares		Dollars			Shares		Dollars			Shares		Dollars
Common Stock
Balance at beginning of year	66.6		$	41.4		66.3		$	41.3		66.0		$	41.2
Issuance of common stock	0.2		0.1			0.3		0.1			0.3		0.1
Balance at end of year	66.8		41.5			66.6		41.4			66.3		41.3
Treasury Stock
Balance at beginning of year	(22.4	)	(753.5		)	(20.5	)	(628.9		)	(19.1	)	(560.3		)
Stock repurchases	(2.4	)	(125.4		)	(1.9	)	(124.6		)	(1.4	)	(68.6		)
Balance at end of year	(24.8	)	(878.9		)	(22.4	)	(753.5		)	(20.5	)	(628.9		)
Additional Paid In Capital
Balance at beginning of year			672.8					668.9					658.5
Share-based compensation effects			4.6					3.9					9.3
Issuance of common stock			—					—					1.1
Balance at end of year			677.4					672.8					668.9
Retained Earnings
Balance at beginning of year			1,501.7					1,358.4					1,249.4
Net income			205.3					205.0					169.3
Dividends declared			(68.0		)			(61.7		)			(60.3		)
Balance at end of year			1,639.0					1,501.7					1,358.4
Accumulated Other Comprehensive Loss
Balance at beginning of year			(148.4		)			(42.7		)			(144.6		)
Other comprehensive (loss) income			(50.4		)			(105.7		)			101.9
Balance at end of year			(198.8		)			(148.4		)			(42.7		)
Total Shareholders’ Equity			$	1,280.2				$	1,314.0				$	1,397.0

See accompanying notes to consolidated financial statements.

64

GATX CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1. Description of Business

As used herein, "GATX," "we," "us," "our," and similar terms refer to GATX Corporation and its subsidiaries, unless indicated otherwise.

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail market. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”), and Portfolio Management.

NOTE 2. Accounting Changes

Change in Accounting Estimate

At the end of 2015, we changed the approach used to measure service and interest costs for pension and other postretirement benefits. For 2015, the Company measured service and interest costs utilizing a single weighted-average discount rate derived from the yield curve used to measure the plan obligations. For 2016, we will measure service and interest costs by applying the specific spot rates along that yield curve to the plans’ liability cash flows. The Company believes the new approach provides a more precise measurement of service and interest costs by aligning the timing of the plans’ liability cash flows to the corresponding spot rates on the yield curve. This change does not affect the measurement of our plan obligations. The Company has accounted for this change as a change in accounting estimate and, accordingly, has accounted for it on a prospective basis.

In 2014, we completed a review of the estimated useful lives used for our North American railcar fleet and determined that the economic service life of many of our railcars differed from the useful life that was used to calculate depreciation. As a result, effective January 1, 2014, we revised the estimated useful lives from a range of 30-38 years to a range of 27-42 years. In aggregate, the average depreciable life of the fleet increased approximately 2.2 years. The impacts of these implemented changes on depreciation expense for affected assets was a net decrease in depreciation expense of approximately $21.9 million and an increase in net income of $14.0 million, or $0.31 per diluted share for the year ended December 31, 2014.

New Accounting Pronouncements Adopted

Debt Issue Costs

As of December 31, 2015, the Company elected to early adopt Accounting Standards Update ("ASU") 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs, which requires presentation of debt issue costs as a deduction from the carrying amount of the related debt liability on the balance sheet, rather than as a deferred charge. Adoption of the new guidance did not impact the amount or timing of net income but required us to reclassify deferred debt issuance costs ($18.8 million in 2015 and $17.6 million in 2014), which were previously included in other assets, to a reduction in the carrying amount of our related debt balances.

Discontinued Operations

In April 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Components of an Entity. The amendments require that disposals representing strategic shifts that have (or will have) a major effect on an entity’s operations or financial results should be reported in discontinued operations. The amendments also expand the disclosure requirements for both discontinued operations and significant dispositions that do not qualify as discontinued operations.

The amendments were effective for us beginning in the first quarter of 2015. Adoption of the new guidance did not impact the amount or timing of net income or the presentation and disclosures of our financial statements.

65

GATX CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

New Accounting Pronouncements Not Yet Adopted

Consolidation

In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810) Amendments to the Consolidation Analysis, which amends the analysis required to determine whether to consolidate certain types of legal entities such as limited partnerships, limited liability corporations, and certain securitization structures. The new guidance is effective for us beginning in the first quarter of 2016, with early adoption permitted. Application of the new guidance will not impact our financial statements and related disclosures.

Business Combinations

In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805), Simplifying the Accounting for Measurement-Period Adjustments, which requires the acquirer in a business combination to recognize measurement-period adjustments in the period in which it determines the amount of the adjustment. The new guidance is effective for us in the first quarter of 2016, with early adoption permitted. We do not expect the new guidance to have a significant impact on our financial statements and related disclosures.

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes most current revenue recognition guidance, including industry-specific guidance. The new guidance requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration it expects to be entitled to in exchange for those goods or services.

In August 2015, the FASB deferred the effective date of this standard from the first quarter of 2017 to the first quarter of 2018. Early adoption is permitted as of the original effective date. We can adopt the new guidance using either the retrospective method or the cumulative effect transition method. We are still evaluating the effect that the new guidance will have on our consolidated financial statements and related disclosures, including which transition method we will use and when we will choose to adopt this standard.

NOTE 3. Significant Accounting Policies

Basis of Presentation

We prepared the accompanying consolidated financial statements in accordance with US generally accepted accounting principles ("GAAP"). Certain prior year amounts may have been reclassified to conform to the 2015 presentation.

Use of Estimates

Preparing financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the amounts we report. We regularly evaluate our estimates and judgments based on historical experience and other relevant facts and circumstances. Actual amounts could differ from our estimates.

Consolidation

Our consolidated financial statements include our assets, liabilities, revenues, and expenses, as well as the assets, liabilities, revenues, and expenses of subsidiaries in which we have a controlling financial interest and variable interest entities for which we are the primary beneficiary. We have eliminated intercompany transactions and balances. Our consolidated subsidiaries include the following wholly owned, bankruptcy-remote special purpose corporations that finance and lease railcars: General American Railcar Corporation, General American Railcar Corporation III, General American Marks Company, and GARC LLC. The debt and lease obligations of these special purpose corporations are nonrecourse to us, and their assets are available first to satisfy claims of their creditors. 

66

GATX CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Investments in Affiliates

We use the equity method to account for investments in joint ventures and other unconsolidated entities if we have the ability to exercise significant influence over the financial and operating policies of those investees. Under the equity method, we record our initial investments in these entities at cost and subsequently adjust the investment for our share of the affiliates’ undistributed earnings (losses), and distributions. We include loans to and from affiliates as part of our investment in the affiliate and include interest on any such loans in our share of the affiliates’ earnings. We review the carrying amount of our investments in affiliates annually, or whenever circumstances indicate that the value of these investments may have declined. If we determine an investment is impaired on an other-than-temporary basis, we record a loss equal to the difference between the fair value of the investment and its carrying value. See "Note 7. Investments in Affiliated Companies."

Variable Interest Entities

We evaluate whether an entity is a variable interest entity based on the sufficiency of the entity’s equity and by determining whether the equity holders have the characteristics of a controlling financial interest. To determine if we are the primary beneficiary of a variable interest entity, we assess whether we have the power to direct the activities that most significantly impact the economic performance of the entity as well as the obligation to absorb losses or the right to receive benefits that may be significant to the entity. These determinations are both qualitative and quantitative, and they require us to make judgments and assumptions about the entity’s forecasted financial performance and the volatility inherent in those forecasted results. We evaluate new investments for variable interest entity determination and regularly review all existing entities for events that may result in an entity becoming a variable interest entity or us becoming the primary beneficiary of an existing variable interest entity. See "Note 8. Variable Interest Entities."

Fair Value Measurements

Fair value is the price that a market participant would receive to sell an asset or pay to transfer a liability in an orderly transaction at the measurement date. We classify fair value measurements according to the three-level hierarchy defined by GAAP, and those classifications are based on our judgment about the reliability of the inputs we use in the fair value measurement. Level 1 inputs are quoted prices available in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly, and may include quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data. For assets or liabilities with a specified contractual term, Level 2 inputs must be observable for substantially the full term of that asset or liability. Level 3 inputs are unobservable, meaning they are supported by little or no market activity. Fair value measurements classified as Level 3 typically rely on pricing models and discounted cash flow methodologies, both of which require significant judgment. See "Note 10. Fair Value Disclosure."

Cash and Cash Equivalents

We classify all highly liquid investments with a maturity of three months or less when purchased as cash equivalents.

Restricted Cash

Restricted cash is cash and cash equivalents that are restricted as to withdrawal and use. Our restricted cash primarily relates to contractually required cash amounts we maintain for two wholly owned bankruptcy-remote, special purpose corporations.

67

GATX CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Operating Assets and Facilities

We state operating assets, facilities, and capitalized improvements at cost. We include assets we acquire under capital leases in operating assets, and we record the related obligations as liabilities. We depreciate operating assets and facilities over their estimated useful lives or lease terms to estimated residual values using the straight-line method. We depreciate leasehold improvements over the shorter of their useful lives or the lease term. Our estimated depreciable lives of operating assets and facilities are as follows:

Railcars	20–42 years
Locomotives	10–20 years
Buildings	40–50 years
Leasehold improvements	5–15 years
Marine vessels	30–65 years
Other equipment	5–30 years

We review long-lived assets for impairment whenever circumstances indicate that the carrying amount of those assets may not be recoverable. We evaluate the recoverability of assets to be held and used by comparing the carrying amount of the asset to the undiscounted future net cash flows we expect the asset to generate. If we determine an asset is impaired, we recognize an impairment loss equal to the amount the carrying amount exceeds the asset’s fair value. We classify assets we plan to sell or otherwise dispose of as held for sale, provided they meet specified accounting criteria, and we record those assets at the lower of their carrying amount or fair value less costs to sell.

Lease Classification

We determine the classification of a lease at its inception. If the provisions of the lease subsequently change, other than by renewal or extension, we evaluate whether that change would have resulted in a different lease classification had the change been in effect at inception. If so, the revised agreement is considered a new lease for lease classification purposes. See "Note 5. Leases."

Operating Leases

We offer full-service and net operating leases. We price full-service leases as an integrated service that includes amounts related to executory costs, such as maintenance, insurance, and ad valorem taxes. We do not offer stand-alone maintenance service contracts and are unable to separate executory costs from full-service lease revenue. We recognize operating lease revenue, including amounts related to executory costs, on a straight-line basis over the term of the underlying lease. As a result, we may not recognize lease revenue in the same period as maintenance and other executory costs, which we expense as incurred. See "Note 5. Leases."

Finance Leases

For finance leases, we record a gross lease payment receivable and an estimated residual value, net of unearned income. For sales-type leases, we may also recognize a gain or loss in the period the lease is recorded. Gross lease payment receivables are the rents we expect to receive through the end of the lease term for a leased asset. Estimated residual values are our estimates of value of an asset at the end of a finance lease term. We review our estimates of residual values annually or whenever circumstances indicate that residual values may have declined. Other-than-temporary declines in value are recognized as impairments. Initial unearned income is the amount that the original lease payment receivable and the estimated residual value of the leased asset exceeds the original cost or carrying value of the leased asset. We amortize unearned income to lease revenue using the interest method, which produces a constant yield over the lease term. We also defer the initial direct costs related to our direct finance leases and amortize those costs over the lease term as an adjustment to lease revenue.

We regularly review the finance lease portfolio and classify finance leases as non-performing if it is probable that we will be unable to collect all amounts due under the lease. We generally stop accruing income on non-performing finance leases until all contractual payments are current. We apply payments we receive for non-performing finance leases to the lease payment receivable. See "Note 5. Leases."

68

GATX CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Inventory

Our inventory consists of railcar and locomotive repair components and marine vessel spare parts. All inventory balances are stated at lower of cost or market. Railcar repair components are valued using the average cost method. Vessel spare parts inventory is valued using the first-in, first-out method. Inventory is included in other assets on the balance sheet.

Loans

We record loans at their principal amount outstanding adjusted for allowances, deferred fees, unamortized premiums or discounts, and accrued interest. We review the loan portfolio regularly and classify a loan as impaired when it is probable that we will be unable to collect all amounts due under the loan agreement. Since most loans are collateralized, we generally measure impairment as the amount the carrying value of the loan exceeds the expected repayments, including any value attributable to underlying collateral. We do not typically recognize interest income on impaired loans until the loan has been paid to contractually current status. We offset loan origination fees by the related direct loan origination costs for a given loan and amortize the net amount of those costs over the term of the loan as an adjustment to interest income. See "Note 6. Loans."

Allowance for Losses

The allowance for losses is our estimate of credit losses associated with reservable assets. Reservable assets are divided into two categories: rent and other receivables, which includes short-term trade billings, and loans and finance lease receivables. We base our loss reserves for rent and other receivables on historical loss experience and judgments about the impact of economic conditions, the state of the markets we operate in, and collateral values, if applicable. In addition, we may establish specific reserves for known troubled accounts. We evaluate reserve estimates for loans and finance lease receivables on a customer-specific basis, considering each customer's particular credit situation. We also consider the factors we use to evaluate rent and other receivables, which are outlined above. We charge amounts against the allowance when we deem them uncollectable. We made no material changes in our estimation methods or assumptions for the allowance during 2015. We believe that the allowance is adequate to cover losses inherent in our reservable assets as of December 31, 2015. Since the allowance is based on judgments and estimates, it is possible that actual losses incurred will differ from the estimate. See "Note 19. Allowance for Losses."

Goodwill

We recognize goodwill when the consideration paid to acquire a business exceeds the fair value of the net assets acquired.  We assign goodwill to the same reporting unit as the net assets of the acquired business and we assess our goodwill for impairment on an annual basis in the fourth quarter, or during interim periods if impairment indicators are present. If the carrying amount of the applicable reporting unit exceeds its fair value, we compare the implied fair value of the reporting unit’s goodwill with the carrying amount of goodwill. We record an impairment loss if the carrying amount of goodwill exceeds its implied fair value. The fair values of our reporting units are determined using discounted cash flow models. See "Note 18. Goodwill."

Income Taxes

We calculate provisions for federal, state, and foreign income taxes on our reported income before income taxes. We base our calculations of deferred tax assets and liabilities on the differences between the financial statement and tax bases of assets and liabilities, using enacted rates in effect for the year we expect the differences will reverse. We reflect the cumulative effect of changes in tax rates from those we previously used to determine deferred tax assets and liabilities in the provision for income taxes in the period the change is enacted. Provisions for income taxes in any given period differ from those currently payable or receivable because certain items of income and expense are recognized in different periods for financial reporting purposes than for income tax purposes. We may deduct expenses or defer income attributable to uncertain tax positions for tax purposes, however, we have not recognized a tax benefit in the financial statements for those items. We include our liability for uncertain tax positions in other liabilities on the balance sheet. See "Note 14. Income Taxes."

Derivatives

We use derivatives, such as interest rate swap agreements, Treasury rate locks, options, and currency forwards, to hedge our exposure to interest rate and foreign currency exchange rate risk on existing and anticipated transactions. We formally designate derivatives that

69

GATX CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

meet specific accounting criteria as qualifying hedges at inception. These criteria require us to have the expectation that the derivative will be highly effective at offsetting changes in the fair value or expected cash flows of the hedged exposure, both at the inception of the hedging relationship and on an ongoing basis.

We recognize all derivative instruments at fair value and classify them on the balance sheet as either other assets or other liabilities. We generally base the classification of derivative activity in the statements of comprehensive income and cash flows on the nature of the hedged item. For derivatives we designate as fair value hedges, we recognize changes in the fair value of both the derivative and the hedged item in earnings. For derivatives we designate as cash flow hedges, we record the effective portion of the change in the fair value of the derivative as part of other comprehensive income (loss), and we recognize those changes in earnings in the period the hedged transaction affects earnings. We recognize any ineffective portion of the change in the fair value of the derivative immediately in earnings. Although we do not hold or issue derivative financial instruments for purposes other than hedging, we do not designate certain derivatives as accounting hedges. We recognize changes in the fair value of these derivatives in earnings immediately. We classify gains and losses on derivatives that are not designated as hedges as other expenses, and we include the related cash flows in cash flows from operating activities. See "Note 10. Fair Value Disclosure."

Defined Benefit Pension and Other Post-Retirement Plans

Our balance sheet reflects the funded status of our pension and post-retirement plans, which is the difference between the fair value of the plan assets and the projected benefit obligation. We recognize the aggregate overfunding of any plans in other assets, the aggregate underfunding of any plans in other liabilities, and the corresponding adjustments for unrecognized actuarial gains (losses) and prior service cost (credits) in accumulated other comprehensive income (loss). See "Note 12. Pension and Other Post-Retirement Benefits."

Foreign Currency

We translate the assets and liabilities of our operations that have non-US dollar functional currencies at exchange rates in effect at year-end. Revenue, expenses, and cash flows are translated monthly using average exchange rates. We defer gains and losses resulting from foreign currency translation and record those gains and losses as a separate component of accumulated other comprehensive income (loss). Gains and losses resulting from foreign currency transactions and from the remeasurement of non-functional currency assets and liabilities are recorded net of related hedges in other expense during the periods in which they occur. Net gains (losses) were $1.1 million, $(3.4) million and $2.1 million for 2015, 2014, and 2013.

Environmental Liabilities

We record accruals for environmental remediation costs at sites relating to past or discontinued operations when they are probable and when we can reasonably estimate the expected costs. We record adjustments to initial estimates as necessary. Since these accruals are based on estimates, actual environmental remediation costs may differ. We expense or capitalize environmental remediation costs related to current or future operations as appropriate. See "Note 24. Legal Proceedings and Other Contingencies."

Marine Operating Revenue

We recognize marine operating revenue as we perform shipping services, and we allocate revenue among reporting periods based on the relative transit time in each reporting period for shipments in process.

Other Revenue

We include customer liability repair revenue, fee income, interest on loans, and other miscellaneous revenues in other revenue. We recognize these revenues when earned, which, in the case of management fees we receive from affiliates, is when we perform the related services.

Interest Expense, net

Interest expense is the interest we accrue on indebtedness and the amortization of debt issuance costs and debt discounts and premiums. We defer debt issuance costs and debt discounts and premiums and amortize them over the term of the related debt. We report interest

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expense net of interest income on bank deposits. Interest income on bank deposits was $1.1 million in 2015, $0.9 million in 2014, and $1.2 million in 2013.

Operating Lease Expense

We classify leases of certain railcars and other assets and facilities, such as maintenance facilities and equipment, as operating leases. We record the lease expense associated with these leases on a straight-line basis. We defer gains and financing costs associated with sale-leasebacks and amortize those gains and costs as a component of operating lease expense over the related leaseback term. We also classify our leases of office facilities and related administrative assets as operating leases, and we record the associated expense in selling, general and administrative expense. See "Note 5. Leases."

Maintenance and Repair Costs

We expense maintenance and repair costs as incurred. We capitalize certain costs incurred in connection with planned major maintenance activities if those activities improve the asset or extend its useful life. We depreciate those capitalized costs over the estimated useful life of the improvement. We capitalize required regulatory survey costs for vessels and amortize those costs over the applicable survey period, which is generally five years.

ASC Expense Seasonality

ASC's sailing season runs from April 1 to December 31 of each year. We defer certain indirect expenses incurred prior to the beginning of the sailing season, such as winter maintenance, insurance, operating lease expense, and depreciation and amortize them ratably over the sailing season.

Share-Based Compensation

We base our measurement of share-based compensation expense on the grant date fair value of an award, and we recognize the expense net of estimated forfeitures over the requisite service period. Forfeiture rates at grant date are initially based on historical experience and are adjusted in subsequent periods if actual experience differs from the estimate. We record a final adjustment when those awards vest. See "Note 13. Share-Based Compensation."

Net Gain on Asset Dispositions

Net gain on disposition includes gains and losses on sales of operating assets and residual sharing income, which we also refer to as asset remarketing income; non-remarketing disposition gains, primarily from scrapping of railcars; and asset impairment losses. We recognize disposition gains, including non-remarketing gains, upon completion of the sale or scrapping of operating assets. Residual sharing income includes fees we receive from the sale of managed assets and assets subject to residual value guarantees, and we recognize these fees upon completion of the underlying transactions.

The following table presents the net gain on asset dispositions for the years ending December 31 (in millions):

	2015			2014			2013
Disposition gains	$	90.3		$	63.1		$	60.0
Residual sharing income	13.4			9.4			10.8
Non-remarketing disposition gains	9.4			16.0			20.7
Asset impairment losses (1)	(33.9		)	(1.3		)	(5.9		)
Net Gain on Asset Dispositions	$	79.2		$	87.2		$	85.6

__________

(1) See "Note 11. Asset Impairments"for further information about asset impairment losses.

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Other Income (Expense)

We include fair value adjustments on certain financial instruments, gains and/or losses on foreign currency transactions and remeasurements, legal defense costs and litigation settlements, along with other miscellaneous income and expense items in other income (expense).

NOTE 4. Supplemental Cash Flow Information and Noncash Investing Transactions

	2015		2014		2013
Supplemental Cash Flow Information (in millions)
Interest paid (1)	$	144.4	$	142.6	$	148.7
Income taxes paid, net	13.3		18.7		7.4

________

(1) Interest paid consisted of interest on debt obligations, interest rate swaps (net of interest received), and capital leases. The interest expense we capitalized as part of the cost of construction of major assets was immaterial for all periods presented.

	2015		2014		2013
Noncash Investing Transactions (in millions)
Capital lease (1)	$	17.8	$	—	$	—
Distributions from affiliates (2)	—		1.1		174.7
Portfolio proceeds (3)	—		—		91.1

________

(1) In 2015, we acquired all of the rights and obligations of 157 rail cars, classified as a capital lease in the amount of $17.8 million, which included the assumption of a capital lease obligation in the amount of $14.8 million.

(2) In 2014, we received distributions of 62 railcars with a fair value of $1.1 million from our Southern Capital Corporation LLC affiliate ("SCC"). In 2013, we received five vessels and related working capital with a fair value of $151.8 million in connection with our disposition of the Singco Gas Pte, Limited ("Singco") and Somargas II Pte Limited ("Somargas") joint ventures. Additionally, we received distributions of 640 railcars with a fair value of $22.9 million from SCC.

(3) In 2013 proceeds from the sale of our interest in Ahaus Alstätter Eisenbahn Cargo AG (“AAE”) included receipt of a €67.5 million ($91.1 million) note.

NOTE 5. Leases

GATX as Lessor

The following table shows the components of our direct finance leases as of December 31 (in millions):

	2015			2014
Total contractual lease payments receivable	$	199.6		$	204.8
Estimated unguaranteed residual value of leased assets	58.7			68.5
Unearned income	(90.7		)	(98.6		)
Finance leases	$	167.6		$	174.7

Usage rents

We base lease revenue for certain operating leases on equipment usage. Lease revenue from such usage rents was $91.2 million in 2015, $83.9 million in 2014, and $21.3 million in 2013. The increases in 2015 and 2014 were due to higher utilization revenue as a result of the acquisition of approximately 18,500 boxcars in 2014.

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Initial direct costs

Deferred initial direct costs related to direct financing leases were $0.1 million at December 31, 2015 and $0.3 million, at December 31, 2014.

Future receipts

The following table shows our future contractual receipts from finance leases and noncancelable operating leases as of December 31, 2015 (in millions):

	Finance Leases		Operating Leases (1)		Total
2016	$	28.3	$	970.3	$	998.6
2017	25.9		815.1		841.0
2018	23.9		684.3		708.2
2019	22.6		568.1		590.7
2020	21.1		442.6		463.7
Years thereafter	77.8		912.2		990.0
	$	199.6	$	4,392.6	$	4,592.2

__________

(1) The future contractual receipts due under our full-service operating leases include executory costs such as maintenance, car taxes, and insurance.

GATX as Lessee

Capital Lease Assets

The following table shows assets we financed with capital lease obligations as of December 31 (in millions):

	2015			2014
Railcars	$	17.8		$	—
Marine vessels	84.5			83.1
Less: allowance for depreciation	(79.8		)	(75.3		)
	$	22.5		$	7.8

Operating Leases

We lease assets that are closely associated with our revenue generating operations. At December 31, 2015 we leased approximately 19,000 railcars at Rail North America and one vessel at ASC. In addition, we lease office facilities and other general purpose equipment. Total operating lease expense, which includes amounts recorded in selling, general and administrative expense, was $91.2 million in 2015, $112.9 million in 2014, and $134.0 million in 2013.

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Lease Obligations

For some leases, we have the option to renew the leases or purchase the assets at the end of the lease term. The specific terms of the renewal and purchase options vary, and we did not include these amounts in our future contractual rental payments. Additionally, the contractual rental payments do not include amounts we are required to pay for licenses, taxes, insurance, and maintenance. The following table shows our future contractual rental payments due under noncancelable leases as of December 31, 2015 (in millions):

	Capital Leases			Recourse Operating Leases
2016	$	4.3		$	85.1
2017	2.8			91.7
2018	1.6			83.0
2019	11.5			79.8
2020	—			72.7
Years thereafter	—			244.0
	$	20.2		$	656.3
Less: amounts representing interest	(1.8		)
Present value of future contractual capital lease payments	$	18.4

NOTE 6. Loans

We had total loans receivable of $8.8 million at December 31, 2015 and $97.3 million at December 31, 2014. No loans were impaired at December 31, 2015 or 2014. In 2015, AAE repaid its outstanding loan in the amount of €68.2 million ($77.2 million), including €67.5 million ($76.4 million) of remaining principal and €0.7 million ($0.8 million) of accrued interest.

The following table shows scheduled loan principal payments due by year at December 31, 2015 (in millions):

2016	$	2.0
2017	2.0
2018	4.2
2019	0.1
2020	0.1
Thereafter	0.4
	$	8.8

NOTE 7. Investments in Affiliated Companies

Investments in affiliated companies represent investments in and loans to domestic and foreign affiliates, and primarily include companies offering lease financing and related services for customers operating rail and marine assets, as well as entities that lease aircraft spare engines. Loan amounts included in investments in affiliated companies were $11.2 million as of December 31, 2015 and $16.3 million as of December 31, 2014.

In 2015, as a result of our decision to exit the majority of our marine investments within our Portfolio Management segment, we recorded a $19.0 million impairment loss and then sold our 50% interest in the Cardinal Marine joint venture. We received aggregate cash proceeds of $24.7 million from this sale.

In 2014, we sold our investments in the Intermodal Investment Fund V and Intermodal Investment Fund VII affiliates. As a result of these sales, we received aggregate cash proceeds of $18.3 million.

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In 2013, we dissolved our Singco and Somargas marine affiliates, taking direct ownership of five liquefied gas carrying vessels with a fair value of $151.8 million. In connection with the dissolution we paid $101.3 million, primarily to satisfy our share of the affiliates' external debt, and recognized a pretax gain of $2.5 million, which is recorded in share of affiliates' earnings. The vessels continue to operate in a vessel pooling arrangement that our former partner manages.

In 2013, we sold our 37.5% interest in AAE to our partner, Ahaus Alstätter Eisenbahn Holding AG (“AAE Holding”), and recognized a pretax gain of $9.3 million, which we reported as part of our share of affiliates' earnings. The sale price of $114.1 million consisted of a cash payment at closing of $23.0 million and a seller loan of €67.5 million ($91.1 million) at a market interest rate. The loan was paid in full in January 2015.

The following table presents our most significant investments in affiliated companies and our ownership percentage in those companies by segment as of December 31, 2015 (in millions):

	Segment	Investment		Percentage Ownership
Rolls-Royce & Partners Finance (1)	Portfolio Management	$	335.1	50.0	%
Adler Funding LLC	Rail North America	11.7		12.5	%
Other affiliates	Various	1.7		Various
Investments in Affiliated Companies		$	348.5

__________

(1) Combined investment balances of fifteen separate joint ventures (collectively, the "RRPF affiliates").

The following table shows our share of affiliates’ earnings by segment for the years ending December 31 (in millions):

	2015			2014			2013
Rail North America	$	0.5		$	7.9		$	10.3
Rail International	(0.3		)	(0.3		)	21.1
Portfolio Management (1)	45.2			60.2			60.9
Share of affiliates' earnings (pretax)	45.4			67.8			92.3
Income taxes	0.5			(18.3		)	(16.5		)
Share of Affiliates' Earnings	$	45.9		$	49.5		$	75.8

__________

(1) Includes a $19.0 million impairment loss in 2015.

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The following table shows our cash investments in and distributions and loan payments from our affiliates by segment for the years ended December 31 (in millions):

	Cash Investments						Cash Distributions (1)
	2015		2014		2013		2015		2014		2013
Rail North America	$	—	$	—	$	—	$	5.1	$	20.0	$	—
Portfolio Management	15.5		15.3		101.3		32.2		34.2		47.0
	$	15.5	$	15.3	$	101.3	$	37.3	$	54.2	$	47.0

__________

(1) Cash distributions exclude proceeds from sales of affiliates of $24.7 million in 2015, $19.4 million in 2014, and $55.6 million in 2013.

Summarized Financial Data of Affiliates

The following table shows the aggregated operating results for the years ended December 31 for the affiliated companies we held at December 31 (in millions):

	2015		2014		2013
Revenues	$	339.3	$	339.0	$	334.5
Gains on sales of assets	37.6		33.7		43.5
Net income	121.4		99.6		108.6

The following table shows aggregated summarized balance sheet data for our affiliated companies as of December 31 (in millions):

	2015		2014
Current assets	$	185.0	$	211.6
Noncurrent assets	3,254.1		3,195.1
Total assets	$	3,439.1	$	3,406.7
Current liabilities	$	285.5	$	378.4
Noncurrent liabilities	2,512.2		2,388.2
Shareholders’ equity	641.4		640.1
Total liabilities and shareholders' equity	$	3,439.1	$	3,406.7

Summarized Financial Data for the RRPF Affiliates

As noted above, our affiliate investments include 50% interests in each of the RRPF affiliates, a collection of fifteen domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. The RRPF affiliates are primarily engaged in two business activities: lease financing of aircraft spare engines to a diverse group of commercial aircraft operators worldwide and lease financing of aircraft spare engines to Rolls-Royce for use in their engine maintenance programs. In aggregate, the RRPF affiliates own 436 aircraft engines at December 31, 2015, of which 224 were on lease to Rolls-Royce. Aircraft engines are generally depreciated over a useful life of 25 years to an estimated residual value. Lease terms vary but typically range from 7 to 10 years. Rolls-Royce manages each of the RRPF affiliates and also performs substantially all required maintenance activities. Our share of affiliates' earnings (after-tax) from the RRPF affiliates was $58.4 million in 2015, $42.2 million in 2014, and $46.5 million in 2013.

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We derived the following financial information from the combined financial statements of the RRPF affiliates.

The following table shows condensed income statements of the RRPF affiliates for the years ending December 31 (in millions):

	2015			2014			2013
Lease revenue from third parties	$	191.4		$	176.9		$	147.6
Lease revenue from Rolls-Royce	138.7			124.7			119.7
Depreciation expense	(166.1		)	(140.7		)	(120.2		)
Interest expense	(56.7		)	(59.5		)	(65.8		)
Other expenses	(8.8		)	(11.8		)	(10.2		)
Gains on sales of assets	33.1			22.7			35.2
Income before income taxes	131.6			112.3			106.3
Income tax benefits (provision) (1)	(9.0		)	(17.3		)	0.4
Net income	$	122.6		$	95.0		$	106.7

_________

(1) Represents income taxes directly attributable to the RRPF affiliates in the United Kingdom. Several of the RRPF affiliates are flow through entities and income taxes are incurred at the owner level. Amounts shown for 2015 and 2013 include deferred income tax benefits of approximately $15.4 million and $15.2 million, attributable to statutory rate decreases enacted in the United Kingdom.

The following table shows the condensed balance sheets of the RRPF affiliates as of December 31 (in millions):

	2015		2014
Current assets	$	173.4	$	146.3
Noncurrent assets, including operating assets, net of accumulated depreciation of $993.6 and $862.8 (a)	3,161.4		2,988.1
Total assets	$	3,334.8	$	3,134.4
Current liabilities, excluding debt	$	85.1	$	74.4
Debt obligations	2,391.1		2,295.7
Other liabilities	231.4		219.4
Shareholders’ equity	627.2		544.9
Total liabilities and shareholders' equity	$	3,334.8	$	3,134.4

_________

(a) All operating assets were pledged as collateral for long-term debt obligations.

The following table shows contractual future lease receipts from noncancelable leases of the RRPF affiliates as of December 31, 2015 (in millions):

	Rolls-Royce		Third Parties		Total
2016	$	144.1	$	157.7	$	301.8
2017	122.9		147.5		270.4
2018	119.0		126.9		245.9
2019	114.0		84.5		198.5
2020	93.3		72.4		165.7
Thereafter	239.5		247.2		486.7
	$	832.8	$	836.2	$	1,669.0

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The following table shows maturities of debt obligations of the RRPF affiliates as of December 31, 2015 (in millions):

2016	$	187.6
2017	279.6
2018	134.3
2019	238.2
2020	470.7
Thereafter	1,076.7
Total debt principal (1)	$	2,387.1

_________

(1) All debt obligations are nonrecourse to the shareholders.

NOTE 8. Variable Interest Entities

We determined that we are the primary beneficiary of one of our variable interest entities, a structured lease financing of a portfolio of railcars, because we have the power to direct its significant activities. As a result, we consolidate this variable interest entity. The risks associated with it are similar to those of our wholly owned railcar leasing activities.

The following table shows the carrying amounts of assets and liabilities of the consolidated variable interest entity as of December 31 (in millions):

	2015		2014
Operating assets, net of accumulated depreciation (1)	$	83.2	$	88.1
Nonrecourse debt	6.9		15.9

_________

(1) All operating assets are pledged as collateral on the nonrecourse debt.

We determined that we are not the primary beneficiary of our other variable interest entities, which are primarily investments in aircraft spare engine leasing affiliates that were financed through a variety of equity investments and third-party lending arrangements. We are not the primary beneficiary of these variable interest entities because we do not have the power to direct the activities that most significantly impact the entities’ economic performance. Rather, that power was shared by the affiliate partners based on the terms of the relevant joint venture agreements, which require approval of all partners for significant decisions regarding the variable interest entity.

The following table shows the carrying amounts and maximum exposure to loss for our unconsolidated variable interest entities as of December 31 (in millions):

	2015				2014
	Net Carrying Amount		Maximum Exposure to Loss		Net Carrying Amount		Maximum Exposure to Loss
Investments in affiliates	$	161.2	$	161.2	$	143.9	$	143.9
Other investment	0.2		0.2		0.4		0.4
Total	$	161.4	$	161.4	$	144.3	$	144.3

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NOTE 9. Debt

Commercial Paper and Borrowings Under Bank Credit Facilities ($ in millions)

	December 31
	2015			2014
Balance	$	7.4		$	72.1
Weighted average interest rate	1.22		%	0.56		%

Recourse and Nonrecourse Debt Obligations

The following table shows the outstanding balances of our debt obligations and the applicable interest rates as of December 31 ($ in millions):

	Date of Issue	Final Maturity	Interest Rate		2015		2014
Recourse Fixed Rate Debt
Unsecured	03/03/06	03/01/16	5.80	%	$	200.0	$	200.0
Unsecured	11/19/10	07/15/16	3.50	%	250.0		250.0
Unsecured	09/20/11	07/15/16	3.50	%	100.0		100.0
Unsecured	03/04/14	03/04/17	1.25	%	300.0		300.0
Unsecured	02/06/08	02/15/18	6.00	%	200.0		200.0
Unsecured	03/19/13	07/30/18	2.38	%	250.0		250.0
Unsecured (1)	12/27/10	10/31/18	3.84	%	10.9		15.7
Unsecured (1)	11/29/10	11/30/18	3.70	%	8.1		12.1
Unsecured	01/30/15	12/31/18	1.20	%	54.3		—
Unsecured	11/19/13	03/15/19	2.50	%	300.0		300.0
Unsecured	03/04/14	07/30/19	2.50	%	250.0		250.0
Unsecured	10/31/14	03/30/20	2.60	%	250.0		250.0
Unsecured	02/06/15	03/30/20	2.60	%	100.0		—
Unsecured	05/27/11	06/01/21	4.85	%	250.0		250.0
Unsecured	09/20/11	06/01/21	4.85	%	50.0		50.0
Unsecured	06/11/12	06/15/22	4.75	%	250.0		250.0
Unsecured	03/19/13	03/30/23	3.90	%	250.0		250.0
Unsecured	02/06/15	03/30/25	3.25	%	300.0		—
Unsecured	03/04/14	03/15/44	5.20	%	300.0		300.0
Unsecured	02/06/15	03/30/45	4.50	%	250.0		—
Unsecured	04/14/05	04/15/15	5.70	%	—		100.0
Unsecured (2)	02/05/10	05/15/15	4.75	%	—		250.0
Unsecured	12/22/05	12/22/15	5.75	%	—		70.0
Total recourse fixed rate debt					$	3,923.3	$	3,647.8
Recourse Floating Rate Debt
Unsecured (1)	09/02/11	08/31/16	0.94	%	$	5.2	$	8.0
Unsecured	12/21/12	12/21/17	1.64	%	100.0		100.0
Unsecured	01/22/13	12/21/17	1.64	%	10.0		10.0
Unsecured	08/28/14	08/28/24	1.71	%	100.0		100.0

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	Date of Issue	Final Maturity	Interest Rate		2015			2014
Unsecured	09/23/15	09/23/25	1.84	%	60.0			—
Unsecured (3)	12/15/10	10/31/15	1.43	%	—			24.8
Unsecured (2)(3)	12/06/11	08/31/16	1.44	%	—			15.3
Unsecured (2)(3)	03/29/06	09/30/16	2.02	%	—			18.9
Unsecured (2)(3)	06/29/07	09/30/16	2.03	%	—			8.5
Unsecured (2)(3)	12/18/07	10/31/16	1.98	%	—			12.7
Unsecured (2)(3)	08/31/12	12/31/19	2.33	%	—			60.5
Unsecured (2)(3)	06/27/13	12/31/20	1.73	%	—			121.0
Unsecured (2)(3)	10/30/13	12/31/20	1.78	%	—			30.2
Unsecured (2)(3)	05/05/14	12/31/20	1.85	%	—			30.2
Total recourse floating rate debt					$	275.2		$	540.1
Nonrecourse Fixed Rate Debt
Secured (1)	09/30/97	09/20/16	6.69	%	$	6.9		$	15.9
Total nonrecourse fixed rate debt					$	6.9		$	15.9
Total debt principal					$	4,205.4		$	4,203.8
Unamortized debt discount and debt issuance costs					(28.5		)	(26.2		)
Debt adjustment for fair value hedges					1.5			0.6
Total Debt					$	4,178.4		$	4,178.2

__________

(1) Amount shown includes scheduled principal payments prior to the final maturity.

(2) Debt repaid prior to the final maturity.

(3) For floating rate debt repaid during 2015, the interest rate reflected is as of the final payment date.

The following table shows the scheduled principal payments of our debt obligations as of December 31, 2015 (in millions):

2016	$	564.8
2017	412.7
2018	517.9
2019	550.0
2020	350.0
Thereafter	1,810.0
Total debt principal	$	4,205.4

At December 31, 2015, $83.2 million of our operating assets were pledged as collateral for certain of our debt obligations.

Shelf Registration Statement

During the third quarter of 2013, we filed an updated shelf registration statement that enables us to issue debt securities and pass-through certificates. The registration statement is effective for three years and does not limit the amount of debt securities and pass-through certificates we can issue.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Credit Lines and Facilities

In 2013, we entered into a new $575 million 5-year unsecured revolving credit facility in the US. In 2015, we exercised an option to extend the maturity date of our revolving credit facility by one year, to April 2020. At December 31, 2015, the full $575 million was available under the facility.

Annual commitment fees for GATX's credit facilities were $1.0 million for 2015, $1.0 million for 2014, and $1.3 million for 2013.

Restrictive Covenants

Our $575 million revolving credit facility contains various restrictive covenants, including requirements to maintain a fixed charge coverage ratio and an asset coverage test. Our ratio of earnings to fixed charges, as defined in this facility, was 2.9for the period ended December 31, 2015, which is in excess of the minimum covenant ratio of1.2. At December 31,2015, we were in compliance with all covenants and conditions of the facility. Some of our bank term loans have the same financial covenants as the facility.

As of December 31, 2015, the indentures for our public debt also contain various restrictive covenants, including limitation on liens provisions that limit the amount of additional secured indebtedness that we may incur to$1,320.4 million. Additionally, certain exceptions to the covenants permit us to incur an unlimited amount of purchase money and nonrecourse indebtedness. At December 31, 2015, we were in compliance with all covenants and conditions of the indentures.

The loan agreements for our European rail subsidiaries ( "GATX Rail Europe" or "GRE") also contain restrictive covenants, including leverage and cash flow covenants specific to those subsidiaries, restrictions on making loans, and limitations on the ability of those subsidiaries to repay loans or to distribute capital to certain related parties (including GATX, the US parent company). These covenants effectively limit GRE's ability to transfer funds to us. At December 31, 2015, the maximum amount that GRE could transfer to us without violating its covenants was$121.5 million, therefore implying the loan covenants restrict$374.4 millionof subsidiary net assets. At December 31, 2015, GRE was in compliance with all covenants and conditions of these loan agreements.

Another subsidiary’s financing that is guaranteed by us contains various restrictive covenants, including covenants that require us to maintain a defined net worth and a fixed charge coverage ratio. This fixed charge coverage ratio covenant is less restrictive than the covenant in our revolving credit facility.

We do not anticipate any covenant violations nor do we anticipate that any of these covenants will restrict our operations or our ability to obtain additional financing.

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NOTE 10. Fair Value Disclosure

The following tables show our assets and liabilities that are measured at fair value on a recurring basis (in millions):

Assets	Total December 31 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate derivatives (1)	$	1.8	$	—	$	1.8	$	—
Foreign exchange rate derivatives (1)	10.2		—		10.2		—
Foreign exchange rate derivatives (2)	0.8		—		0.8		—
Available-for-sale equity securities	3.3		3.3		—		—
Liabilities
Interest rate derivatives (1)	1.2		—		1.2		—
Foreign exchange rate derivatives (1)	0.2		—		0.2		—
Foreign exchange rate derivatives (2)	2.4		—		2.4		—

Assets	Total December 31 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate derivatives (1)	$	1.8	$	—	$	1.8	$	—
Foreign exchange rate derivatives (2)	9.7		—		9.7		—
Available-for-sale equity securities	4.4		4.4		—		—
Liabilities
Interest rate derivatives (1)	5.9		—		5.9		—
Foreign exchange rate derivatives (2)	1.6		—		1.6		—

_________

(1) Designated as hedges.

(2) Not designated as hedges.

We base our valuations of available-for-sale equity securities on their quoted prices on an active exchange. We value derivatives using a pricing model with inputs (such as yield curves and foreign currency rates) that are observable in the market or that can be derived principally from observable market data.

In addition, we review long-lived assets, such as operating assets and facilities, for impairment whenever circumstances indicate that the carrying amount of these assets may not be recoverable. We determine the fair value of the respective assets using Level 3 inputs, including estimates of discounted future cash flows (including net proceeds from sale), independent appraisals, and market comparables, as applicable. See "Note 11. Asset Impairments"for further information about our impairment losses. The fair value of assets held at December 31 that were subject to non-recurring Level 3 fair value measurements was $34.0 million and $2.5 million for 2015 and 2014. These amounts are consistent with the fair value of the assets at the time of impairment.

Derivative instruments

Fair Value Hedges

We use interest rate swaps to manage the fixed-to-floating rate mix of our debt obligations by converting the fixed rate debt to floating rate debt. For fair value hedges, we recognize changes in fair value of both the derivative and the hedged item as interest expense. We had eight instruments outstanding with an aggregate notional amount of $550.0 million as of December 31, 2015 that mature from 2017 to 2020 and eight instruments outstanding with an aggregate notional amount of $600.0 million as of December 31, 2014.

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Cash Flow Hedges

We use interest rate swaps to convert floating rate debt to fixed rate debt. We use Treasury rate locks to hedge our exposure to interest rate risk on anticipated transactions. We also use currency swaps to hedge our exposure to fluctuations in the exchange rates of the foreign currencies in which we conduct business. We had ten instruments outstanding with an aggregate notional amount of $442.9 million as of December 31, 2015 that mature from 2016 to 2022 and seven instruments outstanding with an aggregate notional amount of $281.5 million as of December 31, 2014. Within the next 12 months, we expect to reclassify $5.8 million ($3.6 million after-tax) of net losses on previously terminated derivatives from accumulated other comprehensive income (loss) to interest expense or operating lease expense, as applicable. We reclassify these amounts when interest and operating lease expense on the related hedged transactions affect earnings.

Non-designated Derivatives

We do not hold derivative financial instruments for purposes other than hedging, although certain of our derivatives are not designated as accounting hedges. We recognize changes in the fair value of these derivatives in other (income) expense immediately.

Some of our derivative instruments contain credit risk provisions that could require us to make immediate payment on net liability positions in the event that we default on certain outstanding debt obligations. The aggregate fair value of our derivative instruments with credit risk related contingent features that are in a liability position as of December 31, 2015 was $1.4 million. We are not required to post any collateral on our derivative instruments and do not expect the credit risk provisions to be triggered.

In the event that a counterparty fails to meet the terms of an interest rate swap agreement or a foreign exchange contract, our exposure is limited to the fair value of the swap, if in our favor. We manage the credit risk of counterparties by transacting with institutions that we consider financially sound and by avoiding concentrations of risk with a single counterparty. We believe that the risk of non-performance by any of our counterparties is remote.

The following table shows the impacts of our derivative instruments on our statement of comprehensive income for the years ended December 31 (in millions):

Derivative Designation	Location of Loss (Gain) Recognized	2015			2014			2013
Fair value hedges (1)	Interest expense	$	(0.8	)	$	4.7		$	4.9
Cash flow hedges	Other comprehensive loss (effective portion)	5.3			5.1			(0.7		)
Cash flow hedges	Interest expense (effective portion reclassified from accumulated other comprehensive loss)	5.6			4.9			5.1
Cash flow hedges	Operating lease expense (effective portion reclassified from accumulated other comprehensive loss)	0.3			3.2			1.5
Cash flow hedges (2)	Other (income) expense (effective portion reclassified from accumulated other comprehensive loss)	(6.9		)	(2.1		)	—
Non-designated (3)	Other (income) expense	(6.1		)	(11.4		)	(0.6		)

_________

(1) The fair value adjustments related to the underlying debt equally offset the amounts recognized in interest expense.

(2) For 2015 and 2014, includes $6.1 million and $2.1 million of gains on foreign currency derivatives which are substantially offset by losses from foreign currency remeasurement adjustments, also recognized in Other (income) expense.

(3) For 2015 and 2014, includes $5.1 million, and $10.4 million of gains on foreign currency derivatives which substantially offset losses from foreign currency remeasurement adjustments on the AAE loan, also recognized in Other (income) expense.

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Other Financial Instruments

The carrying amounts of cash and cash equivalents, restricted cash, rent and other receivables, accounts payable, and commercial paper and bank credit facilities approximate fair value due to the short maturity of those instruments. We base the fair values of investment funds, which are accounted for under the cost method, on the best information available, which may include quoted investment fund values. We estimate the fair values of loans and fixed and floating rate debt using discounted cash flow analyses that are based on interest rates currently offered for loans with similar terms to borrowers of similar credit quality. The inputs we use to estimate each of these values are classified in Level 2 of the fair value hierarchy because they are directly or indirectly observable inputs.

The following table shows the carrying amounts and fair values of our other financial instruments as of December 31 (in millions):

	2015		2015		2014		2014
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Investment funds	$	0.6	$	1.2	$	1.5	$	2.4
Loans	8.8		8.7		97.3		97.4
Liabilities
Recourse fixed rate debt	$	3,915.0	$	3,882.6	$	3,639.9	$	3,775.0
Recourse floating rate debt	275.2		264.6		540.0		540.0
Nonrecourse debt	6.9		7.1		15.9		16.6

NOTE 11. Asset Impairments

We recorded impairment losses of $33.9 million, $1.3 million, and $5.9 million for certain of our operating assets in 2015, 2014 and 2013. In addition, an impairment loss of $19.0 million was recorded in 2015 for one of our affiliate investments.

During 2015, GATX management made the decision to exit the majority of our marine investments within the Portfolio Management segment, including six chemical parcel tankers (the "Nordic Vessels"), certain inland marine vessels, and our 50% interest in the Cardinal Marine joint venture. As a result, the Nordic Vessels and the inland marine vessels were classified as held for sale and adjusted to the lower of their respective carrying amounts or fair value less costs to sell. Furthermore, the Cardinal Marine joint venture was evaluated to assess whether an other-than-temporary decline in the value of the investment had occurred. Based on our analysis, an aggregate impairment loss of $49.8 million was recognized. These impairments were driven by our decision to exit these investments and resulted primarily from the associated change in our expected use and holding periods for these assets. The impairment losses on the vessels of $30.8 million were included in net (loss) gains on asset dispositions, and the impairment loss on our Cardinal Marine investment of $19.0 million was included in the share of affiliates' earnings in the consolidated statement of comprehensive income. As of December 31, 2015, we have completed the sales of certain of our marine investments, as well as our 50% interest in the Cardinal Marine joint venture.

In addition to the impairments of marine assets noted above, we also recorded impairment losses of $3.1 million for railcars and other operating assets designated for sale or scrapping in 2015. In 2014 and 2013, impairment losses related to certain railcars and other long-lived assets designated for sale or scrapping. For each year, impairment losses were included in net (loss) gains on asset dispositions in the consolidated statement of comprehensive income. Total assets classified as held for sale at December 31, 2015 were $106.0 million, including $103.4 million of marine investments, all of which we expect to sell in 2016.

NOTE 12. Pension and Other Post-Retirement Benefits

We maintain both funded and unfunded noncontributory defined benefit pension plans covering our domestic employees and the employees of our subsidiaries. We also have a funded noncontributory defined benefit pension plan related to a former business in the United Kingdom that has no active employees. The plans base benefits payable on years of service and/or final average salary. We base our funding policies for the pension plans on actuarially determined cost methods allowable under IRS regulations and statutory requirements in the UK.

In addition to the pension plans, we have other post-retirement plans that provide health care, life insurance, and other benefits for certain retired domestic employees who meet established criteria. Most domestic employees that retire with immediate benefits under our pension plan are eligible for health care and life insurance benefits. The other post-retirement plans are either contributory or noncontributory, depending on various factors.

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During 2015, we offered an early retirement program for certain eligible employees, effective in 2016. This program provided enhanced benefits to the employees that elected to participate and provided the option for employees to receive their benefits as a lump sum payment or as an annuity. Employees that elected to participate in this program will choose their payment option in 2016. Special termination benefits of $9.0 million resulting from this program were recognized as a one-time charge and recorded as an expense in 2015.

We use a December 31 measurement date for all of our plans. The following tables show pension obligations, plan assets, and other post-retirement obligations as of December 31 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life
Change in Benefit Obligation
Benefit obligation at beginning of year	$	502.7		$	442.7		$	40.8		$	40.4
Service cost	7.4			5.9			0.2			0.1
Interest cost	19.6			20.7			1.3			1.6
Plan amendments	—			—			(2.5		)	—
Actuarial (gain) loss	(22.6		)	67.0			(3.6		)	2.6
Benefits paid	(36.9		)	(31.2		)	(2.9		)	(3.9		)
Special termination benefits	7.3			—			1.7			—
Effect of foreign exchange rate changes	(2.5		)	(2.4		)	—			—
Benefit obligation at end of year	$	475.0		$	502.7		$	35.0		$	40.8
Change in Fair Value of Plan Assets
Plan assets at beginning of year	456.9			447.8			—			—
Actual return on plan assets	(4.6		)	40.3			—			—
Effect of exchange rate changes	(2.2		)	(2.4		)	—			—
Company contributions	2.9			2.4			2.9			3.9
Benefits paid	(36.9		)	(31.2		)	(2.9		)	(3.9		)
Plan assets at end of year	$	416.1		$	456.9		$	—		$	—
Funded Status at end of year	$	(58.9	)	$	(45.8	)	$	(35.0	)	$	(40.8	)
Amount Recognized
Other Liabilities and Other Assets (net)	$	(58.9	)	$	(45.8	)	$	(35.0	)	$	(40.8	)
Accumulated other comprehensive loss:
Net actuarial loss	163.3			170.9			(0.2		)	3.3
Prior service (credit) cost	(1.1		)	(2.1		)	(2.0		)	0.4
Accumulated other comprehensive loss	162.2			168.8			(2.2		)	3.7
Total recognized	$	103.3		$	123.0		$	(37.2	)	$	(37.1	)
After-tax amount recognized in accumulated other comprehensive loss	$	101.3		$	105.4		$	(1.4	)	$	2.3

The aggregate accumulated benefit obligation for the defined benefit pension plans was $449.4 million at December 31, 2015 and $475.8 million at December 31, 2014.

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The following table shows our pension plans that have a projected benefit obligation in excess of plan assets as of December 31 (in millions):

	2015		2014
Projected benefit obligations	$	438.3	$	502.7
Fair value of plan assets	378.6		456.9

The following table shows our pension plans that have an accumulated benefit obligation in excess of plan assets as of December 31 (in millions):

	2015		2014
Accumulated benefit obligations	$	412.6	$	170.6
Fair value of plan assets	378.6		140.5

The following table shows the components of net periodic cost (benefit) for the year ended December 31 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2013 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life			2013 Retiree Health and Life
Service cost	$	7.4		$	5.9		$	6.7		$	0.2		$	0.1		$	0.2
Interest cost	19.6			20.7			18.4			1.3			1.6			1.6
Expected return on plan assets	(25.8		)	(28.4		)	(27.5		)	—			—			—
Special termination benefits	7.3			—			—			1.7			—			—
Amortization of:
Unrecognized prior service credit	(1.0		)	(1.0		)	(1.0		)	(0.1		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	14.8			11.3			14.9			(0.2		)	(0.1		)	—
Net periodic cost	$	22.3		$	8.5		$	11.5		$	2.9		$	1.5		$	1.7

We amortize the unrecognized prior service credit using a straight-line method over the average remaining service period of the employees we expect to receive benefits under the plan. We amortize the unrecognized net actuarial loss (gain), which is subject to certain averaging conventions, over the average remaining service period of active employees.

The following table shows the amounts we expect to recognize as components of net periodic cost in 2016 from amounts recorded in accumulated comprehensive loss (gain) as of December 31, 2015 (in millions):

	2016
	Pension Benefits			Retiree Health and Life
Unrecognized net actuarial loss (gain)	$	10.4		$	(0.1	)
Unrecognized prior service credit	(1.0		)	(0.2		)

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We use the following assumptions to measure the benefit obligation, compute the expected long-term return on assets, and measure the periodic cost for our defined benefit pension plans and other post-retirement benefit plans for the years ended December 31:

	2015		2014
Domestic defined benefit pension plans
Benefit Obligation at December 31:
Discount rate — salaried funded and unfunded plans	4.46	%	4.05	%
Discount rate — hourly funded plan	4.51	%	4.10	%
Rate of compensation increases — salaried funded and unfunded plans	2.50	%	2.50	%
Rate of compensation increases — hourly funded plans	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate — salaried funded and unfunded plans	4.05	%	4.80	%
Discount rate — hourly funded plan	4.10	%	4.90	%
Expected return on plan assets — salaried funded plan	6.50	%	7.60	%
Expected return on plan assets — hourly funded plan	6.35	%	6.90	%
Rate of compensation increases — salaried funded and unfunded plans	2.50	%	3.00	%
Rate of compensation increases — hourly funded plan	N/A		N/A
Foreign defined benefit pension plan
Benefit Obligation at December 31:
Discount rate	3.60	%	3.20	%
Rate of pension-in-payment increases	3.00	%	2.90	%
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate	3.20	%	4.40	%
Expected return on plan assets	4.80	%	5.40	%
Rate of pension-in-payment increases	2.90	%	3.40	%
Other post-retirement benefit plans
Benefit Obligation at December 31:
Discount rate - salaried health	3.96	%	3.65	%
Discount rate - hourly health	4.11	%	3.85	%
Discount rate - salaried life insurance	4.40	%	4.00	%
Discount rate - hourly life insurance	4.04	%	3.70	%
Rate of compensation increases	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate - salaried health	3.65	%	4.20	%
Discount rate - hourly health	3.85	%	4.60	%
Discount rate - salaried life insurance	4.00	%	4.75	%
Discount rate - hourly life insurance	3.70	%	4.40	%
Rate of compensation increases	N/A		N/A

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We calculate the present value of expected future pension and post-retirement cash flows as of the measurement date using a discount rate. We base the discount rate on yields for high-quality, long-term bonds with durations similar to that of our projected benefit obligation. We base the expected return on our plan assets on current and expected asset allocations, as well as historical and expected returns on various categories of plan assets. We routinely review our historical returns along with current market conditions to ensure our expected return assumption is reasonable and appropriate.

	2015		2014
Assumed Health Care Cost Trend Rates at December 31
Health care cost trend assumed for next year
Medical claims - pre age 65	7.00	%	7.50	%
Medical claims - post age 65	6.00	%	7.50	%
Prescription drugs claims - pre age 65	10.00	%	7.00	%
Prescription drugs claims - post age 65	10.50	%	7.00	%
Rate to which the cost trend is expected to decline (the ultimate trend rate)
Medical claims	4.50	%	5.00	%
Prescription drugs claims	4.50	%	5.00	%
Year that rate reaches the ultimate trend rate
Medical claims	2024		2023
Prescription drugs claims	2024		2023

The health care cost trend, which is based on projected growth rates for medical and prescription drug claims, has a significant effect on our other post-retirement benefit costs and obligations. The following table shows the effects of a one percentage point change in the health care cost trend rate on service and interest costs for the year ended December 31, 2015 and the post-retirement benefit obligation as of December 31, 2015 (in millions) :

	One Percentage Point Increase		One Percentage Point Decrease
Effect on total of service and interest cost	$	0.1	$	(0.1	)
Effect on post-retirement benefit obligation	1.5		(1.3		)

Our investment policies require that asset allocations of domestic and foreign funded pension plans be maintained at certain targets. The following table shows our weighted-average asset allocations of our domestic funded pension plans at December 31, 2015 and 2014, and current target asset allocation for 2016, by asset category:

			Plan Assets at December 31
	Target		2015		2014
Asset Category
Equity securities	52.0	%	50.2	%	51.7	%
Debt securities	44.0	%	44.4	%	43.9	%
Real estate	4.0	%	5.4	%	4.3	%
Cash	—	%	—	%	0.1	%
	100.0	%	100.0	%	100.0	%

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The following table shows the weighted-average asset allocations of our foreign funded pension plan at December 31, 2015 and 2014, and current target asset allocation for 2016, by asset category:

			Plan Assets at December 31
	Target		2015		2014
Asset Category
Equity securities	36.8	%	36.8	%	37.7	%
Debt securities	63.2	%	63.2	%	62.3	%
	100.0	%	100.0	%	100.0	%

The following tables set forth the fair value of our pension plan assets as of December 31 (in millions):

	Total December 31 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Short-term investment funds	$	1.6	$	1.6	$	—	$	—
Common stock							—
US equities	11.4		11.4		—		—
International equities	1.2		1.2		—		—
Common stock collective funds	190.4		—		190.4		—
Fixed income collective trust funds	160.4		—		160.4		—
Real estate collective trust funds	20.2		—		20.2		—
Loan fund	30.9		—		30.9		—
Total	$	416.1	$	14.2	$	401.9	$	—

	Total December 31 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Short-term investment funds	$	0.9	$	0.9	$	—	$	—
Common stock							—
US equities	13.3		13.3		—		—
International equities	1.6		1.6		—		—
Common stock collective funds	215.2		—		215.2		—
Fixed income collective trust funds	177.8		—		177.8		—
Real estate collective trust funds	17.9		—		17.9		—
Loan fund	30.2		—		30.2		—
Total	$	456.9	$	15.8	$	441.1	$	—

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The following is a description of the valuation techniques and inputs used as of December 31, 2015 and 2014:

Short-term investment funds

We value short-term investment funds based on the closing net asset values quoted by the funds. The net asset values are the unitized fair values of the underlying securities held by the trusts, which are traded in an active market. Short-term investment funds are highly liquid investments in obligations of the US Government or its agencies or instrumentalities, and the related money market instruments. The short-term investment funds have no unfunded commitments, restrictions on redemption frequency, or advance notice periods required for redemption.

Common stock

We value common stock traded in an active market at the last reported sales price on the last business day of the plan year.

Common stock and fixed income collective trust funds

We value common stock and fixed income collective trust funds based on the closing net asset values quoted by the funds. The net asset values are the unitized fair values of the underlying securities held by the trusts, which are traded in an active market. None of the collective trusts have unfunded commitments, restrictions on redemption frequency, or advance notice periods required for redemption. The investment objective of each of the common stock funds is long-term total return through capital appreciation and current income. The fixed income funds are each designed to deliver safety and stability by preserving principal and accumulated earnings.

Real estate collective trust funds

We value real estate collective trust funds based on the net asset values provided by the funds' administrators, which are the unitized fair values of the underlying US commercial real estate investments held by the funds. An independent appraisal determines the fair values of the real estate properties. Redemptions from the real estate funds are available with either 45 or 60 day notice prior to the end of a quarter. A lack of liquidity in the funds may limit or delay redemptions. The investment objective of the real estate funds, which are diversified by location and property type, is long-term return through property appreciation, current income, and timely sales.

Loan fund

The loan fund is a limited liability company (LLC) and is valued using the NAV. The NAV is based on the fair value of the underlying assets owned by the LLC, less its liabilities, multiplied times the ownership interest of the LLC. As of December 31, 2015, the GATX Master Trust held investments in one LLC. Generally, capital may be withdrawn as of the last day of the month upon written notice given on no later than 30 days prior to the withdrawal date. The investment manager may determine in its discretion to allow withdrawals on any such other date. The limited liability company fund seeks to achieve risk-adjusted total returns by buying and selling investments that are anticipated to have a primarily bank loan focus. Investments will be primarily in debt securities of midsize and large capitalizations. The Plan is allocated 100% of the interest that the GATX Corporation Master Trust holds in the LLC. There are no unfunded commitments.

The primary investing objective of the pension plans is to provide benefits to plan participants and their beneficiaries. To achieve this goal, we invest in a diversified portfolio of equities, debt, and real estate investments to maximize return and to keep long-term investment risk at a reasonable level. Equity investments are diversified across US and non-US stocks, growth and value stocks, and small cap and large cap stocks. Debt securities are predominately investments in long-term, investment-grade corporate bonds. Real estate investments include investments in funds that are diversified by location and property type.

On a timely basis, but not less than twice a year, we formally review pension plan investments to ensure we adhere to investment guidelines and our stated investment approach. Our review also evaluates the reasonableness of our investment decisions and risk positions. We compare our investments' performance to indices and peers to determine if investment performance has been acceptable.

In 2016, we expect to contribute approximately $6.4 million to our pension and other post-retirement benefit plans. Additional contributions to the domestic funded pension plans will depend on investment returns on plan assets and actuarial experience.

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The following table shows benefit payments, which reflect expected future service, as appropriate, we expect the plan to pay (in millions):

	Funded Plans		Unfunded Plans		Retiree Health and Life
2016	$	42.9	$	2.5	$	3.9
2017	27.9		2.6		3.8
2018	28.1		2.6		3.3
2019	28.2		3.2		2.8
2020	28.6		3.5		2.6
Years 2021-2025	144.5		18.3		11.6
	$	300.2	$	32.7	$	28.0

In addition to our defined benefit plans, we have two 401(k) retirement plans available to substantially all salaried employees and certain other employee groups. We may contribute to the plans as specified by their respective terms and as our board of directors determines. Contributions to our 401(k) retirement plans were $1.9 million for 2015, $1.8 million for 2014, and $1.6 million for 2013.

Multiemployer Plans

Most of the shipboard personnel at ASC participate in various multiemployer benefit plans that provide pension, health care, and post-retirement and other benefits to active and retired employees. Unlike single employer plans, we do not recognize plan assets or obligations for multiemployer plans on our balance sheet. Rather, we recognize our contributions to the plans as marine operating expenses. The amounts we contribute are based on the number of crew hours worked, which depends on the number of vessels deployed and aggregate operating days in a particular year. The risks of participating in these multiemployer plans are different from single employer plans in the following aspects:

• Assets contributed by one employer may be used to provide benefits to employees of other participating employers;

• If a participating employer fails to make its required contributions, any unfunded obligations of the plan may be the responsibility of the remaining participating employers; and

• If an employer chooses to stop participating in a multiemployer plan, the plan may require the withdrawing company to make additional contributions.

The following table shows our contributions to multiemployer benefit plans for the years indicated (in millions):

Multiemployer Plans	EIN and Pension Plan Number	Pension Protection Act Zone Status	GATX Contributions						Collective Bargaining Agreement Expiration Date
			2015		2014		2013
American Maritime Officers Pension Plan (1)	13-1969709-001	Endangered-Yellow	$	1.4	$	1.5	$	1.4	January 15, 2017
Other multiemployer post-retirement plans			6.8		7.0		6.7
Total			$	8.2	$	8.5	$	8.1

__________________

(1)Our contributions represented more than 5% of the total contributions to the plan during each year and no surcharge was imposed for any year. The actuary for the American Maritime Officers Pension Plan certified that the plan is in endangered status (i.e. “yellow zone” as defined by the Pension Protection Act of 2006) for the plan year beginning October 1, 2013, because it has funding or liquidity problems, or both. A rehabilitation plan, as defined by the Employee Retirement Security Act of 1974, was instituted under which certain adjustable benefits were reduced or eliminated, and we are required to contribute at a negotiated rate per day worked by each employee.

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NOTE 13. Share-Based Compensation

We provide equity awards to our employees under the GATX Corporation 2012 Incentive Award Plan, including grants of stock appreciation rights, restricted stock units, performance shares and phantom stock awards. As of December 31, 2015, 3.5 million shares were authorized under the 2012 Plan and 1.8 million shares were available for future issuance. We recognize compensation expense for our equity awards in selling, general and administrative expenses over the service period of each award. Share-based compensation expense was $11.6 million for 2015, $14.0 million for 2014, and $13.1 million for 2013, and the related tax benefits were $4.4 million for 2015, $5.3 million for 2014, and $4.9 million for 2013.

Stock Options and Stock Appreciation Rights

Stock options and stock appreciation rights entitle the holder to purchase shares of common stock for periods up to seven years from the grant date. Stock appreciation rights entitle the holder to receive the difference between the market price of our common stock at the time of exercise and the exercise price, either in shares of common stock, cash, or a combination thereof, at our discretion. Stock options entitle the holder to purchase shares of our common stock at a specified exercise price. Since 2006, only stock-settled stock appreciation rights have been awarded. The dividends that accrue on all stock options and stock appreciation rights are paid upon vesting and continue to be paid until the stock options or stock appreciation rights are exercised, canceled, or expire. The exercise price for stock options and stock appreciation rights is equal to the average of the high and low trading prices of our common stock on the date of grant. We recognize compensation expense on a straight-line basis over the vesting period of the award, which is generally three years.

The estimated fair value of a stock appreciation right is the sum of the value we derive using the Black-Scholes option pricing model and the present value of dividends we expect to pay over the expected term of the stock appreciation right. The Black-Scholes valuation incorporates various assumptions, including expected term, expected volatility, and risk free interest rates. We base the expected term on historical exercise patterns and post-vesting terminations, and we base the expected volatility on the historical volatility of our stock price over a period equal to the expected term. We use risk-free interest rates that are based on the implied yield on recently-issued US Treasury zero-coupon bonds with a term comparable to the expected term.

The following table shows the weighted average fair value for our stock appreciation rights and the assumptions we used to estimate fair value:

	2015			2014			2013
Weighted average estimated fair value	$	18.16		$	18.12		$	18.89
Quarterly dividend rate	$	0.38		$	0.33		$	0.30
Expected term of stock appreciation rights, in years	4.7			4.4			4.7
Risk-free interest rate	1.2		%	1.3		%	0.7		%
Dividend yield	2.6		%	2.3		%	2.6		%
Expected stock price volatility	29.2		%	30.3		%	42.4		%
Present value of dividends	$	6.90		$	5.76		$	5.60

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The following table shows information about outstanding stock options and stock appreciation rights for the year ended December 31, 2015:

	Number of Stock Options and Stock Appreciation Rights (in thousands)	Weighted Average Exercise Price
Outstanding at beginning of the year	1,490	$	39.65
Granted	342	56.91
Exercised	(231)	25.96
Forfeited/Cancelled	(26)	53.29
Expired	(1)	50.02
Outstanding at end of the year	1,574	45.18
Vested and exercisable at end of the year	976	38.68

The following table shows the aggregate intrinsic value of stock options and stock appreciation rights exercised in 2015, 2014, and 2013, and the weighted average remaining contractual term and aggregate intrinsic value of stock appreciation rights outstanding and vested as of December 31, 2015:

Stock Options and Stock Appreciation Rights	Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (in millions)
Exercised in 2013		$	6.9
Exercised in 2014		11.8
Exercised in 2015		6.2
Outstanding at December 31, 2015 (a)	3.7	6.3
Vested and exercisable at December 31, 2015	2.7	6.3

__________________

(a) As of December 31, 2015, there are no remaining stock options outstanding.

As of December 31, 2013, all stock options were either exercised, forfeited, or expired. Therefore, no cash was received from employees for exercises of stock options during the year ended December 31, 2015 and December 31, 2014. The total cash we received from employees for exercises of stock options during the years ended December 31, 2013 was $1.2 million. As of December 31, 2015, we had $6.0 million of unrecognized compensation expense related to nonvested stock appreciation rights, which we expect to recognize over a weighted average period of 1.7 years.

Restricted Stock Units and Performance Shares

Restricted stock units entitle the recipient to receive a specified number of restricted shares of common stock upon vesting. Restricted stock units do not carry voting rights and are not transferable prior to the expiration of a specified restriction period, which is generally three years, as determined by the Compensation Committee of the Board of Directors ("Compensation Committee"). We accrue dividends on all restricted stock units and pay those dividends when the awards vest. We recognize compensation expense for these awards over the applicable vesting period.

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Performance shares are restricted shares that we grant to key employees for achieving certain strategic objectives. The shares convert to common stock at the end of a specified performance period if predetermined performance goals are achieved, as determined by the Compensation Committee. We estimate the number of shares we expect will vest as a result of actual performance against the performance criteria at the time of grant to determine total compensation expense to be recognized. We reevaluate the estimate annually and adjust total compensation expense for any changes to the estimate of the number of shares we expect to vest. We recognize compensation expense for these awards over the applicable vesting period, which is generally three years. The performance shares granted in 2014 include an option to settle shares earned in cash upon vesting.

We value our restricted stock units and performance share awards using the average of the high and low values of our common stock on the grant date of the awards. As of December 31, 2015, there was $6.3 million of unrecognized compensation expense related to these awards, which we expect to be recognized over a weighted average period of 2.1 years.

The following table shows information about restricted stock units and performance shares for the year ended December 31, 2015:

	Number of Share Units Outstanding		Weighted Average Grant-Date Fair Value
Restricted Stock Units:
Nonvested at beginning of the year	177,210		$	48.90
Granted	68,710		56.73
Vested	(63,748	)	44.92
Forfeited	(10,232	)	54.33
Nonvested at end of the year	171,940		53.18
Performance Shares:
Nonvested at beginning of the year	175,069		$	48.95
Granted	61,740		55.54
Net (decrease) due to estimated performance	(22,578	)	54.39
Vested	(92,991	)	45.01
Nonvested at end of the year	121,240		54.32

The total fair value of restricted stock units and performance shares that vested during the year was $7.2 million in 2015, $6.6 million in 2014, and $7.5 million in 2013.

Phantom Stock Awards

We grant phantom stock awards to non-employee directors as a component of their compensation for service on our board of directors. In accordance with the terms of the phantom stock awards, each director is credited with a quantity of units that equate to, but are not, common shares. Phantom stock awards are dividend participating, and all dividends are reinvested in additional phantom shares at the average of the high and low trading prices of our stock on the dividend payment date. At the expiration of each director’s service on the board of directors, or in accordance with his or her deferral election, whole units of phantom stock will be settled with shares of common stock and fractional units will be paid in cash. In 2015, we granted 23,431 units of phantom stock and there were 166,021 units outstanding as of December 31, 2015.

NOTE 14. Income Taxes

Deferred income taxes are the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. We have not recognized deferred US income taxes on the undistributed earnings of foreign subsidiaries and affiliates that we intend to permanently reinvest in foreign operations. The cumulative amount of such earnings was $847.7 million at December 31, 2015. The ultimate tax cost of repatriating these earnings depends on tax laws in effect and other circumstances at the time of distribution.

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The following table shows the significant components of our deferred tax liabilities and assets as of December 31 (in millions):

	2015			2014
Deferred Tax Liabilities
Book/tax basis difference due to depreciation	$	1,058.1		$	963.8
Investments in affiliated companies	72.9			99.7
Lease accounting	7.3			10.5
Other	—			0.1
Total deferred tax liabilities	1,138.3			1,074.1
Deferred Tax Assets
Federal net operating loss	13.2			41.8
Alternative minimum tax credit	14.8			9.2
Foreign tax credit	5.8			3.6
Valuation allowance on foreign tax credit	(5.8		)	(3.6		)
State net operating loss	27.7			28.7
Valuation allowance on state net operating loss	(12.6		)	(11.3		)
Foreign net operating loss	3.6			5.8
Valuation allowance on foreign net operating loss	(0.3		)	(0.2		)
Accruals not currently deductible for tax purposes	22.2			18.7
Allowance for losses	3.2			1.7
Pension and post-retirement benefits	35.8			32.6
Other	12.4			9.8
Total deferred tax assets	120.0			136.8
Net deferred tax liabilities	$	1,018.3		$	937.3

At December 31, 2015, we have a US federal tax net operating loss carryforward of $37.7 million that will start expiring in 2033. We also have an alternative minimum tax credit of $14.8 million that has an unlimited carryforward period.

At December 31, 2015, we have foreign tax credits of $5.8 million that are scheduled to expire beginning in 2016. We have recorded a $5.8 million valuation allowance related to these credits, as we believe it is more likely than not that we will be unable to utilize them. We also have state net operating losses of $27.7 million, net of federal benefits that are scheduled to expire at various times beginning in 2016. We have recorded a $12.6 million valuation allowance related to state net operating losses, as we believe it is more likely than not that we will be unable to use all of these losses. Additionally, we have foreign net operating losses, net of valuation allowances, of $3.3 million which have unlimited carryforward periods. Our use of future tax credits and net operating losses depends on a number of variables, including the amount of taxable income, foreign source income attributes, and state apportionment factors.

The following table shows a reconciliation of the beginning and ending amount of our gross liability for unrecognized tax benefits (in millions)

	2015		2014
Beginning balance	$	5.6	$	5.7
Reductions due to settlement of tax audit issues	—		(0.4		)
Additions to tax positions for prior years	0.1		0.3
Ending balance	$	5.7	$	5.6

At December 31, 2015, our gross liability for unrecognized tax benefits was $5.7 million, of which $3.8 million, if recognized, would favorably impact income tax expense. During the year ended December 31, 2015, we added an additional $0.1 million gross state tax liability. During the year ended December 31, 2014, we settled a tax audit recognizing a tax benefit of $0.4 million. Additionally, in 2014,

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we added a gross state tax liability of $0.3 million (net tax expense impact of $0.2 million). We recognize interest and penalties related to unrecognized tax benefits as income tax expense. We have not accrued any amounts for penalties. To the extent interest is not assessed or is otherwise reduced with respect to uncertain tax positions, we will record any required adjustment as a reduction of income tax expense.

We file one consolidated federal income tax return with our domestic subsidiaries in the US jurisdiction, as well as tax returns in various state and foreign jurisdictions. As of December 31, 2015, all audits or statute of limitations with respect to our federal tax returns for years prior to 2012 have been closed or expired. However, GATX and our subsidiaries are undergoing audits in various state jurisdictions.

The following table shows the components of income before income taxes, excluding affiliates, for the years ending December 31 (in millions):

	2015		2014		2013
Domestic	$	174.7	$	137.9	$	66.0
Foreign	95.6		93.3		93.0
	$	270.3	$	231.2	$	159.0

The following table shows income taxes, excluding domestic and foreign joint ventures, for the years ending December 31 (in millions):

	2015			2014		2013
Current
Domestic:
Federal	$	5.6		$	0.7	$	1.4
State and local	(0.2		)	0.6		—
	5.4			1.3		1.4
Foreign	15.3			13.0		10.5
	20.7			14.3		11.9
Deferred
Domestic:
Federal	44.7			45.0		36.6
State and local	33.7			5.6		5.3
	78.4			50.6		41.9
Foreign	11.8			10.8		11.7
	90.2			61.4		53.6
Income taxes	$	110.9		$	75.7	$	65.5

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The following table shows the differences between our effective income tax rate and the federal statutory income tax rate for the years ending December 31 (in millions):

	2015			2014			2013
Income taxes at federal statutory rate	$	94.6		$	80.9		$	55.6
Adjust for effect of:
GATX income taxes on sale of AAE	—			—			23.2
Foreign tax credits	—			—			(3.9		)
Foreign earnings taxed at lower rates	(6.2		)	(8.5		)	(10.3		)
Tax effect of foreign dividends	0.9			—			—
Corporate owned life insurance	(0.9		)	(0.6		)	(0.5		)
State income taxes	7.6			4.1			1.5
State deferred tax rate change impact	14.1			—			—
Other	0.8			(0.2		)	(0.1		)
Income taxes	$	110.9		$	75.7		$	65.5
Effective income tax rate	41.0		%	32.7		%	41.2		%

In 2015, our effective tax rate was 41.0% compared to 32.7% in 2014 and 41.2% in 2013. The current year effective tax rate reflects incremental deferred state income taxes of $14.1 million associated with a change in our consolidated effective state tax rate. Specifically, the sale of our marine assets in our Portfolio Management segment will have a negative impact on our allocation factors that will increase our overall effective state income tax rates in future years. Additionally, the rate in 2015 reflects a higher contribution from domestic source income, which is taxed at a higher rate, as well as the impact of an increase in the statutory tax rate in Alberta, Canada. In 2013, we recognized US and state income taxes of $23.2 million on the sale of our investment in AAE. Additionally, we realized foreign tax credit carry forwards of $3.9 million.

The adjustment for foreign earnings in each year reflects the impact of lower tax rates on income earned at our foreign subsidiaries. State income taxes are recognized on domestic pretax income or loss. The amount of our domestic income subject to state taxes relative to our total worldwide income impacts the effect state income tax has on our overall income tax rate.

Separately, our affiliates incurred a tax benefit of $0.5 million in 2015, and income taxes of $18.3 million in 2014, and $16.5 million in 2013. The 2015 and 2013 amounts were favorably impacted by tax benefits of $7.7 million and $7.6 million respectively, as a result of income tax rate reductions enacted in the United Kingdom.

NOTE 15. Concentrations

Concentration of Revenues

We derived revenue from a wide range of industries and companies. In 2015, we generated approximately 30% of our total revenues from customers in the petroleum industry, 18% from the chemical industry, 15% from the transportation industry, 9% from the mining, minerals and aggregates industry, and 7% from the food/agriculture industries. Our foreign identifiable revenues were primarily derived in Germany, Canada, Poland, Mexico, and Austria.

Concentration of Credit Risk

We did not have revenue concentrations greater than 10% from any particular customer for the years ended December 31, 2015, 2014, and 2013. Under our lease agreements with customers, we typically retain legal ownership of the assets unless such assets have been financed by sale-leasebacks. We perform a credit evaluation prior to approval of a lease contract. Subsequently, we monitor the creditworthiness of the customer and the value of the collateral on an ongoing basis. We maintain an allowance for losses to provide for credit losses inherent in our reservable assets portfolio.

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Concentration of Labor Force

As of December 31, 2015, collective bargaining agreements covered approximately 42% of our employees, of which agreements covering 22% of employees will expire within the next year. The hourly employees at our US service centers are represented by the United Steelworkers. Employees at three of Rail North America's Canadian service centers are represented by Unifor, the union formerly known as the Communication, Energy and Paperworkers Union of Canada, and Employee Shop Committee of Riviere-des-Prairies. The unlicensed shipboard personnel on twelve of the ASC vessels in operation during 2015 are represented by the Seafarers International Union. Licensed personnel on ASC’s vessels, other than captains, are represented by the American Maritime Officers. Certain employees of GATX Rail Europe are represented by one union in Germany and three unions in Poland.

NOTE 16. Commercial Commitments

We have entered into various commercial commitments, such as guarantees and standby letters of credit, related to certain transactions. These commercial commitments require us to fulfill specific obligations in the event of third-party demands. Similar to our balance sheet investments, these commitments expose us to credit, market, and equipment risk. Accordingly, we evaluate these commitments and other contingent obligations using techniques similar to those we use to evaluate funded transactions.

The following table shows our commercial commitments as of December 31 (in millions):

	2015		2014
Lease payment guarantees	$	22.1	$	28.5
Standby letters of credit and performance bonds	8.9		9.1
Total commercial commitments (1)	$	31.0	$	37.6

__________________

(1) The carrying value of liabilities on the balance sheet for commercial commitments was $4.1 million at December 31, 2015 and $5.1 million at December 31, 2014. The expirations of these commitments range from 2017 to 2023. We are not aware of any event that would require us to satisfy any of our commitments.

Lease payment guarantees are commitments to financial institutions to make lease payments for a third party in the event they default. We reduce any liability that may result from these guarantees by the value of the underlying asset or group of assets.

We are also parties to standby letters of credit and performance bonds, which primarily relate to contractual obligations and general liability insurance coverages. No material claims have been made against these obligations, and no material losses are anticipated.

NOTE 17. Earnings per Share

We compute basic earnings per share by dividing net income available to our common shareholders by the weighted average number of shares of our common stock outstanding. We appropriately weighted shares issued or reacquired during the year for the portion of the year that they were outstanding. Our diluted earnings per share reflect the impacts of our potentially dilutive securities, which include our equity compensation awards.

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The following table shows the computation of our basic and diluted net income per common share for the years ending December 31 (in millions, except per share amounts):

	2015		2014		2013
Numerator:
Net income	$	205.3	$	205.0	$	169.3
Denominator:
Weighted average shares outstanding - basic	43.1		45.0		46.4
Effect of dilutive securities:
Equity compensation plans	0.7		0.8		0.7
Weighted average shares outstanding - diluted	43.8		45.8		47.1
Basic earnings per share	$	4.76	$	4.55	$	3.64
Diluted earnings per share	$	4.69	$	4.48	$	3.59

NOTE 18. Goodwill

Our goodwill, all of which pertains to Rail North America and Rail International, was $79.7 million as of December 31, 2015 and $86.1 million as of December 31, 2014. In the fourth quarter of 2015, we performed a review for impairment of goodwill, and concluded that goodwill was not impaired. For 2015 and 2014, changes in the carrying amount of our goodwill resulted from changes in foreign currency exchange rates.

NOTE 19. Allowance for Losses

The following table shows changes in the allowance for losses at December 31 (in millions):

	2015			2014
Beginning balance	$	5.7		$	5.2
Provision for losses	6.6			0.8
Charges to allowance	(1.9		)	(0.3		)
Recoveries and other, including foreign exchange adjustments	(0.1		)	—
Ending balance	$	10.3		$	5.7

The allowance for losses is comprised of a general allowance for trade receivables and specific allowances for finance leases. As of December 31, 2015, the general allowance for trade receivables was $6.3 million, or 9.1% of rent and other receivables, compared to $4.5 million, or 5.2% of rent and other receivables, at December 31, 2014. At December 31, 2015, specific allowances for finance leases were $4.0 million compared to $1.2 million at December 2014. The specific allowance increase in 2015 was related to a loss reserve recorded in connection with one investment at Portfolio Management.

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NOTE 20. Other Assets and Other Liabilities

The following table shows the components of other assets reported on our balance sheets as of December 31 (in millions):

	2015		2014
Inventory	$	55.2	$	52.0
Office furniture, fixtures and other equipment, net of accumulated depreciation	31.8		34.1
Derivatives	12.7		11.5
Deferred financing costs	3.4		4.0
Assets held for sale	106.0		7.0
Other investments	4.2		6.0
Prepaid items	14.3		12.4
Prepaid pension	0.7		—
Other	84.1		84.4
	$	312.4	$	211.4

Assets held for sale increased at December 31, 2015 as a result of management's decision to exit the majority of our marine investments within the Portfolio Management segment. For additional information, see "Note 11. Asset Impairments."

The following table shows the components of other liabilities reported on our balance sheets as of December 31 (in millions):

	2015		2014
Accrued operating lease expense	$	19.3	$	43.4
Accrued pension and other post-retirement benefits	94.6		86.6
Deferred gains on sale-leasebacks	44.8		49.0
Unrecognized tax benefits	3.8		3.6
Environmental accruals	13.2		13.8
Deferred income	7.7		5.6
Derivatives	3.7		7.5
Other	33.5		36.6
	$	220.6	$	246.1

Accrued operating lease expense decreased at December 31, 2015 as a result of the purchase of railcars previously on operating leases during the year.

NOTE 21. Shareholders’ Equity

In 2015, we purchased 2.4 million shares of common stock for $125.4 million, which completed our $250 million repurchase program authorized in 2014. In 2014, we purchased 1.9 million shares of common stock for $124.6 million. In 2013, we purchased 1.4 million shares of common stock for $68.6 million, which completed our $200 million repurchase authorization approved in 2008. Subsequent to December 31, 2015, our board of directors authorized a new $300 million stock repurchase program. The timing of share repurchases will be dependent on market conditions and other factors.

In accordance with our certificate of incorporation, 120 million shares of common stock are authorized, at a par value of $0.625 per share. As of December 31, 2015, 66.8 million shares were issued and 42.0 million shares were outstanding.

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The following shares of common stock were reserved as of December 31, 2015 (in millions):

GATX Corporation 2004 Equity Incentive Compensation Plan	2.3
GATX Corporation 2012 Incentive Award Plan	3.5
	5.8

Our certificate of incorporation also authorizes five million shares of preferred stock at a par value of $1.00 per share. As of December 31, 2015 and December 31, 2014, we have no outstanding shares of preferred stock. In 2013, we either converted or redeemed all 15,567 outstanding shares of our $2.50 cumulative convertible preferred stock.

NOTE 22. Accumulated Other Comprehensive Income (Loss)

The following table shows the change in components for accumulated other comprehensive loss (in millions):

	Foreign Currency Translation Gain (Loss)			Unrealized Gain (Loss) on Securities			Unrealized Loss on Derivative Instruments			Post-Retirement Benefit Plans			Total
Balance at December 31, 2012	$	31.4		$	(0.4	)	$	(44.5	)	$	(131.1	)	$	(144.6	)
Change in component	25.8			1.4			22.3			71.0			120.5
Reclassification adjustments into earnings	—			—			6.6			13.8			20.4
Income tax effect	—			(0.6		)	(6.5		)	(31.9		)	(39.0		)
Balance at December 31, 2013	57.2			0.4			(22.1		)	(78.2		)	(42.7		)
Change in component	(79.1		)	(0.2		)	0.3			(57.3		)	(136.3		)
Reclassification adjustments into earnings	—			—			6.0			10.1			16.1
Income tax effect	—			0.1			(3.3		)	17.7			14.5
Balance at December 31, 2014	(21.9		)	0.3			(19.1		)	(107.7		)	(148.4		)
Change in component	(55.8		)	(1.0		)	1.6			(0.9		)	(56.1		)
Reclassification adjustments into earnings	—			—			(1.0		)	13.5			12.5
Income tax effect	—			0.4			(2.4		)	(4.8		)	(6.8		)
Balance at December 31, 2015	$	(77.7	)	$	(0.3	)	$	(20.9	)	$	(99.9	)	$	(198.8	)

________

See "Note 10. Fair Value Disclosure" and "Note 12. Pension and Other Post-Retirement Benefits" for impacts of the reclassification adjustments on the statement of comprehensive income.

NOTE 23. Foreign Operations

For the years ended December 31, 2015, 2014, and 2013, we did not derive revenues in excess of 10% of our consolidated revenues from any one foreign country. Additionally, at December 31, 2015 and 2014, we did not have more than 10% of our identifiable assets in any one foreign country.

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The following table shows our domestic and foreign revenues and identifiable assets for the years ended or as of December 31 (in millions):

	2015		2014		2013
Revenues
Foreign	$	329.4	$	346.2	$	332.1
United States	1,120.5		1,104.8		988.9
	$	1,449.9	$	1,451.0	$	1,321.0
Identifiable Assets
Foreign	$	1,992.3	$	2,133.3	$	2,199.2
United States	4,901.9		4,786.6		4,336.3
	$	6,894.2	$	6,919.9	$	6,535.5

NOTE 24. Legal Proceedings and Other Contingencies

Various legal actions, claims, assessments and other contingencies arising in the ordinary course of business are pending against GATX and certain of our subsidiaries. These matters are subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved or settled adversely.

Viareggio Derailment

In June 2009, a train consisting of fourteen liquefied petroleum gas (“LPG”) tank cars owned by GATX Rail Austria GmbH (an indirect subsidiary of the Company, "GATX Rail Austria") and its subsidiaries derailed while passing through the City of Viareggio, in the province of Lucca, Italy. Five tank cars overturned and one of the overturned cars was punctured by a peg or obstacle along the side of the track, resulting in a release of LPG, which subsequently ignited. Thirty-two people died and others were injured in the fire, which also resulted in property damage. The LPG tank cars were leased to FS Logistica S.p.A., a subsidiary of the Italian state-owned railway, Ferrovie dello Stato S.p.A (the “Italian Railway”).

On December 14, 2012, the Public Prosecutors of Lucca ("Public Prosecutors") formally charged GATX Rail Austria and two of its subsidiaries (collectively, "GRA"), as well as ten maintenance and supervisory employees (the "Employees"), with various negligence-based crimes related to the accident, all of which are punishable under Italian law by incarceration, damages, and fines. Similar charges were brought against four Italian Railway companies and eighteen of their employees, among others. The Public Prosecutors assert that the axle on a tank car broke, causing the derailment and resulting in a tank rupture and release of LPG, after the car hit an obstacle placed on the side of the track by the Italian Railway. The Public Prosecutors further allege that a crack in the axle was detectable at the time of final inspection but was overlooked by the Employees at the Jungenthal Waggon GmbH workshop (a subsidiary of GATX Rail Austria). The trial in the Court of Lucca (the “Lucca Trial”) commenced on November 13, 2013.

With respect to civil claims, GRA’s insurers continue to work cooperatively with the insurer for the Italian Railway to adjust and settle personal injury and property damage claims. These joint settlement efforts have so far settled most of the significant civil claims related to the accident; however, approximately 80 civil claimants did not settle and are currently parties to the Lucca Trial. The Court of Lucca will determine both the civil and criminal liability of the defendants in the one proceeding. GRA expects that its insurers will cover any civil damages if awarded to the claimants in the Lucca trial. The Public Prosecutors and civil claimants have finished presenting their cases in the Lucca Trial. GRA, the Italian Railway, and the other defendants in the Lucca Trial began presenting the defense of their cases on September 16, 2015, which presentations are currently underway.

Since May 2012, one of the excess insurers providing coverage, Liberty Mutual Insurance Europe Limited (“Liberty”), settled civil claims but refused to reimburse GRA for its ongoing legal defense fees and costs, taking a position contrary to our other insurers in the prior underlying layers that had provided coverage for such expenses. As of December 31, 2015, GRA had incurred approximately $12.2 million in unreimbursed defense fees and costs, and GRA continues to incur costs in connection with the Lucca Trial. Consequently, in October 2013, GRA filed an arbitration proceeding against Liberty seeking to recoup its unreimbursed defense fees and costs (the “Liberty Arbitration”), which was heard in November 2015. GRA received a partial arbitration award in its favor and anticipates reimbursement

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of a portion its defense costs in relation to the Lucca Trial. GRA is currently negotiating issues of reimbursement for outstanding defense costs with the insurers in the current coverage layer, which also includes a 25% share held by Liberty.

While GRA believes that it and its Employees acted diligently and properly, we cannot predict the outcome of the negotiations with our insurers, the Lucca Trial, or what other legal proceedings or claims, if any, may be initiated against GRA or its personnel, and, therefore, cannot reasonably estimate the possible amount or range of loss that may ultimately be incurred in connection with this accident.

Other Litigation

GATX and its subsidiaries have been named as defendants in various other legal actions and claims, governmental proceedings, and private civil suits arising in the ordinary course of business, including environmental matters, workers’ compensation claims, and other personal injury claims. Some of these proceedings include claims for punitive as well as compensatory damages.

Several of our subsidiaries have also been named as defendants or co-defendants in cases alleging injury caused by exposure to asbestos. The plaintiffs seek an unspecified amount of damages based on common law, statutory, or premises liability or, in the case of ASC, the Jones Act, which provides limited remedies to certain maritime employees. As of January 31, 2016, there were 79 asbestos-related cases pending against GATX and its subsidiaries. Of the total number of pending cases, 63 are Jones Act claims, most of which were filed against ASC before the year 2000. During 2015, 5 new cases were filed, and 26 cases were dismissed without payment or otherwise settled for an immaterial amount. In addition, demand has been made against GATX for asbestos-related claims under limited indemnities given in connection with the sale of certain of our former subsidiaries. It is possible that the number of these cases or claims for indemnity could begin to grow and that the cost of these cases, including costs to defend, could correspondingly increase in the future.

Litigation Accruals

We have recorded accruals totaling $1.9 million at December 31, 2015 for losses related to those litigation matters that we believe to be probable and for which an amount of loss can be reasonably estimated. However, we cannot determine a reasonable estimate of the maximum possible loss or range of loss for these matters given that they are at various stages of the litigation process and each case is subject to the inherent uncertainties of litigation (such as the strength of our legal defenses and the availability of insurance recovery). Although the maximum amount of liability that may ultimately result from any of these matters cannot be predicted with absolute certainty, management expects that none of the matters for which we have recorded an accrual, when ultimately resolved, will have a material adverse effect on our consolidated financial position or liquidity. It is possible, however, that the ultimate resolution of one or more of these matters could have a material adverse effect on our results of operations in a particular quarter or year if such resolution results in liability that materially exceeds the accrued amount.

In addition, we have other litigation matters pending for which we have not recorded any accruals because our potential liability for those matters is not probable or cannot be reasonably estimated based on currently available information. For those matters where we have not recorded an accrual but a loss is reasonably possible, we cannot determine a reasonable estimate of the maximum possible loss or range of loss for these matters given that they are at various stages of the litigation process and each case is subject to the inherent uncertainties of litigation (such as the strength of our legal defenses and the availability of insurance recovery). Although the maximum amount of liability that may ultimately result from any of these matters cannot be predicted with absolute certainty, management expects that none of the matters for which we have not recorded an accrual, when ultimately resolved, will have a material adverse effect on our consolidated financial position or liquidity. It is possible, however, that the ultimate resolution of one or more of these matters could have a material adverse effect on our results of operations in a particular quarter or year if such resolution results in a significant liability for GATX.

Environmental

Our operations are subject to extensive federal, state, and local environmental regulations. Our operating procedures include practices to protect the environment from the risks inherent in full service railcar leasing, which involves maintaining railcars used by customers to transport chemicals and other hazardous materials. Under some environmental laws in the US and certain other countries, the owner of a leased railcar may be liable for environmental damage and cleanup or other costs in the event of a spill or discharge of material from a railcar without regard to the owner's fault. While our standard master railcar lease agreement requires the lessee to indemnify us against environmental claims and to carry liability insurance coverage, such indemnities and insurance may not fully protect us against claims for environmental damage. Additionally, some of our real estate holdings, including previously owned properties, are or have been used

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for industrial or transportation-related purposes or leased to commercial or industrial companies whose activities might have resulted in discharges on the property. As a result, we are subject to environmental cleanup and enforcement actions. In particular, the federal Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), also known as the Superfund law, as well as similar state laws, impose joint and several liability for cleanup and enforcement costs on current and former owners and operators of a site without regard to fault or the legality of the original conduct. If there are other potentially responsible parties (“PRPs”), we generally contribute to the cleanup of these sites through cost-sharing agreements with terms that vary from site to site. Costs are typically allocated based on the relative volumetric contribution of material, the period of time the site was owned or operated, and/or the portion of the site owned or operated by each PRP.

At the time a potential environmental issue is identified, initial accruals for environmental liability are established when such liability is determined to be probable and a reasonable estimate of the associated costs can be made. Costs are estimated based on the type and level of investigation and/or remediation activities that our internal environmental staff (and where appropriate, independent consultants) have advised to be necessary to comply with applicable laws and regulations. Activities include surveys and environmental studies of potentially contaminated sites as well as costs for remediation and restoration of sites determined to be contaminated. In addition, we have provided indemnities for potential environmental liabilities to buyers of divested companies. In these instances, accruals are based on the scope and duration of the respective indemnities together with the extent of known contamination. Estimates are periodically reviewed and adjusted as required to reflect additional information about facility or site characteristics or changes in regulatory requirements. We conduct a quarterly environmental contingency analysis, which considers a combination of factors including independent consulting reports, site visits, legal reviews, analysis of the likelihood of participation in and the ability of other PRPs to pay for cleanup, and historical trend analyses.

We are involved in administrative and judicial proceedings and other voluntary and mandatory cleanup efforts at 18 sites, including Superfund sites, for which we are contributing to the cost of performing the study or cleanup, or both, of alleged environmental contamination. As of December 31, 2015, we have recorded accruals of $13.2 million for remediation and restoration costs that we believe to be probable and for which the amount of loss can be reasonably estimated. These amounts are included in other liabilities on our balance sheet. Our environmental liabilities are not discounted.

We did not materially change our methodology for identifying and calculating environmental liabilities in the last three years. Currently, no known trends, demands, commitments, events or uncertainties exist that are reasonably likely to occur and materially affect the methodology or assumptions described above.

The recorded accruals represent our best estimate of all costs for remediation and restoration of affected sites, without reduction for anticipated recoveries from third parties, and include both asserted and unasserted claims. However, we are unable to provide a reasonable estimate of the maximum potential loss associated with these sites because cleanup costs cannot be predicted with certainty. Various factors beyond our control can impact the amount of loss GATX will ultimately incur with respect to these sites, including the extent of corrective actions that may be required; evolving environmental laws and regulations; advances in environmental technology, the extent of other parties' participation in cleanup efforts; developments in periodic environmental analyses related to sites determined to be contaminated, and developments in environmental surveys and studies of potentially contaminated sites. As a result, future charges associated with these sites could have a significant effect on results of operations in a particular quarter or year if the costs materially exceed the accrued amount as individual site studies and remediation and restoration efforts proceed. However, management believes it is unlikely that the ultimate cost to GATX for any of these sites, either individually or in the aggregate, will have a material adverse effect on our consolidated financial position or liquidity.

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NOTE 25. Financial Data of Business Segments

The financial data presented below depicts the profitability, financial position, and capital expenditures of each of our business segments.

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail market. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”), and Portfolio Management.

Rail North America is comprised of our wholly owned operations in the United States, Canada, and Mexico, as well as an affiliate investment. Rail North America primarily provides railcars pursuant to full-service leases under which it maintains the railcars, pays ad valorem taxes and insurance, and provides other ancillary services.

Rail International is comprised of our wholly owned European operations ("GATX Rail Europe" or "GRE") and a wholly owned railcar leasing business in India ("Rail India"), as well as one development stage affiliate in China. GRE leases railcars to customers throughout Europe pursuant to full-service leases under which it maintains the railcars and provides value-adding services according to customer requirements.

ASC operates the largest fleet of US-flagged vessels on the Great Lakes, providing waterborne transportation of dry bulk commodities such as iron ore, coal, limestone aggregates, and metallurgical limestone.

Portfolio Management generates leasing, marine operating, asset remarketing and management fee income through a collection of diversified wholly owned assets and joint venture investments.

Segment profit is an internal performance measure used by the Chief Executive Officer to assess the performance of each segment in a given period. Segment profit includes all revenues, pretax earnings from affiliates, and net gains on asset dispositions that are attributable to the segments, as well as expenses that management believes are directly associated with the financing, maintenance, and operation of the revenue earning assets. Segment profit excludes selling, general and administrative expenses, income taxes, and certain other amounts not allocated to the segments. These amounts are included in Other.

We allocate debt balances and related interest expense to each segment based upon a predetermined fixed recourse leverage level expressed as a ratio of recourse debt (including off-balance sheet debt) to equity. The leverage levels are 5:1 for Rail North America, 2:1 for Rail International, 1.5:1 for ASC, and 3:1 for Portfolio Management. We believe that by using this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

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The following tables show certain segment data for the years ended December 31, 2015, 2014, and 2013 (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2015 Profitability
Revenues
Lease revenue	$	930.9		$	172.9		$	4.1		$	22.2		$	—		$	1,130.1
Marine operating revenue	—			—			166.1			68.9			—			235.0
Other revenue	75.9			7.5			—			1.4			—			84.8
Total Revenues	1,006.8			180.4			170.2			92.5			—			1,449.9
Expenses
Maintenance expense	264.2			39.6			22.3			—			—			326.1
Marine operating expense	—			—			107.2			48.7			—			155.9
Depreciation expense	215.1			43.7			14.3			17.4			—			290.5
Operating lease expense	82.2			—			5.2			—			(0.2		)	87.2
Other operating expense	26.2			5.1			—			7.1			—			38.4
Total Expenses	587.7			88.4			149.0			73.2			(0.2		)	898.1
Other Income (Expense)
Net gain (loss) on asset dispositions	67.2			6.8			(0.1		)	5.3			—			79.2
Interest expense, net	(102.1		)	(22.4		)	(5.3		)	(20.0		)	(5.3		)	(155.1		)
Other expense	(5.2		)	(6.0		)	(0.7		)	—			(1.3		)	(13.2		)
Share of affiliates' earnings (pretax) (1)	0.5			(0.3		)	—			45.2			—			45.4
Segment profit (loss)	$	379.5		$	70.1		$	15.1		$	49.8		$	(6.4	)	508.1
Selling, general and administrative expense																192.4
Income taxes (including $0.5 tax benefits related to affiliates' earnings)																110.4
Net income																$	205.3
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	66.6			—			—			23.7			—			$	90.3
Residual sharing income	0.8			—			—			12.6			—			13.4
Non-remarketing disposition gains (2)	2.3			7.2			(0.1		)	—			—			9.4
Asset impairment	(2.5		)	(0.4		)	—			(31.0		)	—			(33.9		)
	$	67.2		$	6.8		$	(0.1	)	$	5.3		$	—		$	79.2
Capital Expenditures
Portfolio investments and capital additions	$	524.5		$	148.0		$	20.3		$	18.4		$	3.5		$	714.7
Selected Balance Sheet Data
Investments in affiliated companies	$	12.0		$	1.4		$	—		$	335.1		$	—		$	348.5
Identifiable assets	$	4,629.1		$	1,117.6		$	284.7		$	636.5		$	226.3		$	6,894.2

__________

(1) Includes a $19.0 million impairment loss in the Portfolio Management segment.

(2) Includes scrapping gains.

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	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2014 Profitability
Revenues
Lease revenue	$	864.1		$	188.6		$	4.2		$	29.7		$	—		$	1,086.6
Marine operating revenue	—			—			223.0			63.3			—			286.3
Other revenue	63.4			10.3			—			4.4			—			78.1
Total Revenues	927.5			198.9			227.2			97.4			—			1,451.0
Expenses
Maintenance expense	265.5			45.9			25.6			—			—			337.0
Marine operating expense	—			—			149.2			48.6			—			197.8
Depreciation expense	190.0			47.1			13.6			22.8			—			273.5
Operating lease expense	103.7			—			5.2			—			(0.2		)	108.7
Other operating expense	21.9			5.1			—			1.9			—			28.9
Total Expenses	581.1			98.1			193.6			73.3			(0.2		)	945.9
Other Income (Expense)
Net gain (loss) on asset dispositions	72.3			6.0			(0.5		)	9.4			—			87.2
Interest expense, net	(98.4		)	(24.7		)	(5.6		)	(24.3		)	(5.4		)	(158.4		)
Other expense	(7.2		)	(3.1		)	(0.2		)	(1.2		)	(1.8		)	(13.5		)
Share of affiliates' earnings (pretax)	7.9			(0.3		)	—			60.2			—			67.8
Segment profit (loss)	$	321.0		$	78.7		$	27.3		$	68.2		$	(7.0	)	488.2
Selling, general and administrative expense																189.2
Income taxes (including $18.3 related to affiliates' earnings)																94.0
Net income																$	205.0
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	57.4		$	0.6		$	—		$	5.1		$	—		$	63.1
Residual sharing income	5.2			—			—			4.2			—			9.4
Non-remarketing disposition gains (1)	10.4			5.7			(0.1		)	—			—			16.0
Asset impairment	(0.7		)	(0.3		)	(0.4		)	0.1			—			(1.3		)
	$	72.3		$	6.0		$	(0.5	)	$	9.4		$	—		$	87.2
Capital Expenditures
Portfolio investments and capital additions	$	810.6		$	163.6		$	18.4		$	32.3		$	5.6		$	1,030.5
Selected Balance Sheet Data
Investments in affiliated companies	$	17.2		$	1.8		$	—		$	338.7		$	—		$	357.7
Identifiable assets	$	4,358.2		$	1,228.8		$	286.7		$	813.3		$	232.9		$	6,919.9

__________

(1) Includes scrapping gains.

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	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2013 Profitability
Revenues
Lease revenue	$	758.9		$	180.2		$	4.2		$	31.9		$	—		$	975.2
Marine operating revenue	—			—			223.5			51.6			—			275.1
Other revenue	58.2			8.8			—			3.7			—			70.7
Total Revenues	817.1			189.0			227.7			87.2			—			1,321.0
Expenses
Maintenance expense	228.2			42.9			22.9			—			—			294.0
Marine operating expense	—			—			151.3			38.5			—			189.8
Depreciation expense	176.7			43.2			12.1			23.0			—			255.0
Operating lease expense	124.4			—			5.2			—			(0.2		)	129.4
Other operating expense	18.4			5.3			—			2.4			—			26.1
Total Expenses	547.7			91.4			191.5			63.9			(0.2		)	894.3
Other Income (Expense)
Net gain (loss) on asset dispositions	67.7			3.7			(1.3		)	15.5			—			85.6
Interest expense, net	(106.0		)	(23.9		)	(6.2		)	(26.7		)	(3.8		)	(166.6		)
Other expense (income)	(9.8		)	(1.1		)	0.2			1.4			0.9			(8.4		)
Share of affiliates' earnings (pretax)	10.3			21.1			—			60.9			—			92.3
Segment profit (loss)	$	231.6		$	97.4		$	28.9		$	74.4		$	(2.7	)	429.6
Selling, general and administrative expense																178.3
Income taxes (including $16.5 related to affiliates' earnings)																82.0
Net income																$	169.3
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	51.1		$	0.3		$	—		$	8.6		$	—		$	60.0
Residual sharing income	3.4			—			—			7.4			—			10.8
Non-remarketing disposition gains (1)	14.5			6.2			—			—			—			20.7
Asset impairment	(1.3		)	(2.8		)	(1.3		)	(0.5		)	—			(5.9		)
	$	67.7		$	3.7		$	(1.3	)	$	15.5		$	—		$	85.6
Capital Expenditures
Portfolio investments and capital additions	$	502.4		$	168.5		$	11.2		$	170.5		$	7.0		$	859.6
Selected Balance Sheet Data
Investments in affiliated companies	$	31.4		$	2.0		$	—		$	320.9		$	—		$	354.3
Identifiable assets	$	3,710.3		$	1,296.2		$	271.0		$	856.9		$	401.1		$	6,535.5

__________

(1) Includes scrapping gains.

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NOTE 26. Selected Quarterly Financial Data (unaudited)

	First  Quarter		Second Quarter		Third Quarter (2)		Fourth Quarter (3)		Total
	In millions, except per share data
2015
Total revenues	$	319.7	$	365.3	$	386.2	$	378.7	$	1,449.9
Net income	$	62.2	$	45.4	$	39.5	$	58.2	$	205.3
Per Share Data (1)
Basic	$	1.41	$	1.04	$	0.92	$	1.38	$	4.76
Diluted	$	1.39	$	1.03	$	0.91	$	1.37	$	4.69
2014
Total revenues	$	286.6	$	365.8	$	397.2	$	401.4	$	1,451.0
Net income	$	42.1	$	53.1	$	51.3	$	58.5	$	205.0
Per Share Data (1)
Basic	$	0.92	$	1.17	$	1.16	$	1.32	$	4.55
Diluted	$	0.90	$	1.15	$	1.14	$	1.30	$	4.48

___________________

(1) Quarterly earnings per share may not be additive, as per share amounts are computed independently for each quarter and the full year is based on the respective weighted average common shares and common stock equivalents outstanding.

(2) In the third quarter of 2015, net income included $31.1 million of net impairment losses and $4.5 million of net disposition gains, both related to the decision to exit the majority of the marine investments within the Portfolio Management segment.

(3) In the fourth quarter of 2015, net income included $9.0 million of net disposition gains related to the decision to exit the majority of the marine investments within the Portfolio Management segment. In addition, we recorded $14.1 million of expense attributable to an increase in our effective state income tax rate, $7.7 million of benefit resulting from a reduction in the statutory income tax rate in the UK, and $5.6 million of net expenses associated with an early retirement program offered to certain employees.

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Item 9.  Changes in and Disagreements with Accountants on Accounting andFinancial Disclosure

None.

Item 9A.  Controls and Procedures

Management’s Report Regarding the Effectiveness of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has conducted an evaluation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934 (the “Exchange Act”)). Based on such evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of the period covered by this annual report, our disclosure controls and procedures were effective.

Management’s Report Regarding the Effectiveness of Internal Control and Procedures

Our management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act for us. Our internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Our internal control over financial reporting includes those policies and procedures that:

(i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets;

(ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors; and

(iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. In addition, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate as a result of changes in conditions, or that the degree of compliance with the applicable policies and procedures may deteriorate.

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has conducted an evaluation of our internal control over financial reporting as of the end of the period covered by this annual report based on the framework in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework). Such evaluation included reviewing the documentation of our internal controls, evaluating the design effectiveness of the internal controls and testing their operating effectiveness.

Based on such evaluation, our management has concluded that as of the end of the period covered by this annual report, our internal control over financial reporting was effective.

Ernst & Young LLP, the independent registered public accounting firm that audited the financial statements included in this annual report, has issued a report on our internal control over financial reporting. That report follows.

110

Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting

The Board of Directors and Shareholders of GATX Corporation and subsidiaries

We have audited GATX Corporation and subsidiaries’ internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). GATX Corporation and subsidiaries’ management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report Regarding the Effectiveness of Internal Control and Procedures. Our responsibility is to express an opinion on the company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, GATX Corporation and subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of GATX Corporation and subsidiaries as of December 31, 2015 and 2014, and the related consolidated statements of comprehensive income, changes in shareholders’ equity and cash flows for each of the three years in the period ended December 31, 2015 and our report dated February 24, 2016, expressed an unqualified opinion thereon.

Chicago, Illinois

February 24, 2016

111

Changes in Internal Control Over Financial Reporting

No change in our internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) occurred during the fiscal quarter ended December 31, 2015, that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Item 9B.  Other Information

None.

PART III

Item 10.  Directors, Executive Officers and Corporate Governance

Information required by this item regarding directors, our Code of Business Conduct and Ethics, Code of Ethics for Senior Company Officers, Audit Committee Financial Experts, compliance with Section 16(a) of the Exchange Act, and corporate governance is contained in sections entitled "Nominees for Election to the Board of Directors", "Director Criteria and Nomination Process", "Board of Directors", "Board Independence", "Board Leadership Structure", "Board Committees", "Director and Officer Identification and Insurance Arrangements", "Communication with the Board", "Audit Committee Report", and "Section 16(a) Beneficial Ownership Reporting Compliance" in our definitive Proxy Statement to be filed on or about March 11, 2016, which sections are incorporated herein by reference.

Information regarding executive officers is included after Item 1 in Part I of this Form 10-K.

Item 11.  Executive Compensation

Information required by this item regarding compensation of our directors and executive officers is contained in sections entitled “Director Compensation”, “Compensation Discussion and Analysis”, “Compensation Committee Report”, and “Executive Compensation Tables”, in our definitive Proxy Statement to be filed on or about March 11, 2016, which sections are incorporated herein by reference.

Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Information required by this item regarding security ownership of certain beneficial owners and management is contained in sections entitled “Security Ownership of Directors and Executive Officers” and “Principal Shareholders” in our definitive Proxy Statement to be filed on or about March 11, 2016, which sections are incorporated herein by reference.

Item 13.  Certain Relationships and Related Transactions, and DirectorIndependence

Information required by this item regarding transactions with related persons and director independence is contained in the sections entitled “Related Party Transactions” and “Board Independence” in our definitive Proxy Statement to be filed on or about March 11, 2016, which sections are incorporated herein by reference.

Item 14.  Principal Accounting Fees and Services

Information required by this item regarding fees paid to Ernst & Young is contained in sections entitled "Pre-Approval Policy", “Audit Fees”, “Audit Related Fees”, “Tax Fees”, and “All Other Fees” in our definitive Proxy Statement to be filed on or about March 11, 2016, which sections are incorporated herein by reference.

112

PART IV

Item 15.  Exhibits, Financial Statement Schedules

(a) 1.  Financial Statements

	Page
Documents Filed as Part of this Report:
Report of Independent Registered Public Accounting Firm with respect to the consolidated financial statements	60
Consolidated Balance Sheets — December 31, 2015 and 2014	61
Consolidated Statements of Comprehensive Income — Years Ended December 31, 2015, 2014, and 2013	62
Consolidated Statements of Cash Flows — Years Ended December 31, 2015, 2014, and 2013	63
Consolidated Statements of Changes in Shareholders’ Equity — Years Ended December 31, 2015, 2014, and 2013	64
Notes to Consolidated Financial Statements	65
Report of Independent Registered Public Accounting Firm with respect to internal control over financial reporting	111

2. Financial Statement Schedules:

Schedule I Condensed Financial Information of Registrant 115

All other schedules for which provision is made in the applicable accounting regulations of the Securities and Exchange Commission are not required under the related instructions or are inapplicable, and, therefore, have been omitted.

3. Exhibits. See the Exhibit Index included herewith and incorporated by reference hereto.

113

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

GATX CORPORATION
	Registrant
	/s/ BRIAN A. KENNEY
	Brian A. Kenney
	Chairman, President and Chief Executive Officer
	February 24, 2016

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following persons on behalf of the Registrant and in the capacities and on the date indicated.

/s/ BRIAN A. KENNEY	Chairman, President and Chief Executive Officer (Principal Executive Officer)
Brian A. Kenney
February 24, 2016
/s/ ROBERT C. LYONS	Executive Vice President and Chief Financial Officer (Principal Financial Officer)
Robert C. Lyons
February 24, 2016
/s/ WILLIAM M. MUCKIAN	Senior Vice President, Controller and Chief Accounting Officer (Principal Accounting Officer)
William M. Muckian
February 24, 2016
Anne L. Arvia	Director
Ernst A. Häberli	Director
James B. Ream	Director
Robert J. Ritchie	Director
David S. Sutherland	Director
Casey J. Sylla	Director
Stephen R. Wilson	Director
Paul G. Yovovich	Director
/s/ DEBORAH A. GOLDEN	Executive Vice President, General Counsel and Corporate Secretary (Attorney in Fact)
Deborah A. Golden
February 24, 2016

114

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT

GATX CORPORATION

(Parent Company)

BALANCE SHEETS

(In millions)

	December 31
	2015		2014
Assets
Cash and cash equivalents	$	147.6	$	162.3
Operating assets and facilities, net	3,373.6		3,397.0
Investments in affiliated companies	2,255.3		2,199.5
Other assets	709.4		396.0
Total Assets	$	6,485.9	$	6,154.8
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	$	72.0	$	54.9
Debt	4,107.7		3,821.1
Other liabilities	1,026.0		964.8
Total Liabilities	5,205.7		4,840.8
Total Shareholders’ Equity	1,280.2		1,314.0
Total Liabilities and Shareholders’ Equity	$	6,485.9	$	6,154.8

See accompanying note to condensed financial statements.

115

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONT’D)

GATX CORPORATION

(Parent Company)

STATEMENTS OF COMPREHENSIVE INCOME

(In millions)

	Year Ended December 31
	2015			2014			2013
Revenues
Lease revenue	$	718.3		$	669.7		$	543.0
Other revenue	66.7			60.2			51.3
Total Revenues	785.0			729.9			594.3
Expenses
Maintenance expense	233.6			227.6			176.5
Depreciation expense	164.8			147.7			131.1
Operating lease expense	61.7			83.0			89.5
Other operating expense	25.4			17.1			12.7
Selling, general and administrative expense	149.2			139.7			131.1
Total Expenses	634.7			615.1			540.9
Other Income (Expense)
Net gain on asset dispositions	48.0			67.9			68.6
Interest expense, net	(68.7		)	(66.7		)	(63.7		)
Other income (expense)	—			2.5			(7.0		)
Income before Income Taxes and Share of Affiliates' Earnings	129.6			118.5			51.3
Income Taxes	(62.4		)	(41.7		)	(10.7		)
Share of Affiliates' Earnings, Net of Taxes	138.1			128.2			128.7
Net Income	$	205.3		$	205.0		$	169.3
Other Comprehensive Income, Net of Taxes
Foreign currency translation adjustments	(55.8		)	(79.1		)	25.8
Unrealized (loss) gain on securities	(0.6		)	(0.1		)	0.8
Unrealized (loss) gain on derivative instruments	(1.8		)	3.0			22.4
Post-retirement benefit plans	7.8			(29.5		)	52.9
Other comprehensive (loss) income	(50.4		)	(105.7		)	101.9
Comprehensive Income	$	154.9		$	99.3		$	271.2

See accompanying note to condensed financial statements.

116

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONT’D)

GATX CORPORATION

(Parent Company)

STATEMENTS OF CASH FLOWS

(In millions)

	Year Ended December 31
	2015			2014			2013
Operating Activities
Net cash provided by operating activities	$	412.5		$	219.5		$	104.3
Investing Activities
Capital additions	(602.9		)	(748.1		)	(513.5		)
Purchases of leased-in assets	(118.4		)	(150.5		)	(61.4		)
Proceeds from sale-leasebacks	—			—			90.7
Portfolio proceeds and other	208.7			169.5			320.7
Net cash used in investing activities	(512.6		)	(729.1		)	(163.5		)
Financing Activities
Repayments of debt (original maturities longer than 90 days)	(350.0		)	(692.2		)	(483.8		)
Net increase (decrease) in debt with original maturities of 90 days or less	(69.0		)	69.0			(185.0		)
Proceeds from issuances of debt (original maturities longer than 90 days)	695.7			1,188.7			967.0
Stock repurchased	(125.4		)	(124.6		)	(68.6		)
Dividends	(68.2		)	(62.0		)	(60.5		)
Other	2.3			(1.6		)	1.2
Net cash provided by financing activities	85.4			377.3			170.3
Net (decrease) increase in cash and cash equivalents during the year	(14.7		)	(132.3		)	111.1
Cash and Cash Equivalents at beginning of year	162.3			294.6			183.5
Cash and Cash Equivalents at end of year	$	147.6		$	162.3		$	294.6

See accompanying note to condensed financial statements.

117

Note to Condensed Financial Statements

Basis of Presentation

The condensed financial statements represent the Balance Sheets, Statements of Comprehensive Income and Cash Flows of GATX Corporation, the parent company. In these parent-company-only financial statements, our investment in subsidiaries and joint ventures (collectively "affiliates") is stated at cost plus equity in undistributed earnings of affiliates since the date of acquisition. Our share of net income from affiliates is included in consolidated net income using the equity method. The parent-company-only financial statements should be read in conjunction with our consolidated financial statements.

118

EXHIBIT INDEX

Exhibit Number	Exhibit Description
Filed with this Report:
12	Statement regarding computation of ratios of earnings to combined fixed charges and preferred stock dividends.
21	Subsidiaries of the Registrant.
23	Consent of Ernst & Young LLP, Independent Registered Public Accounting Firm.
24	Powers of Attorney with respect to the Annual Report on Form 10-K for the fiscal year ended December 31, 2015.
31.1	Certification Pursuant to Exchange Act Rule 13a-14(a) and Rule 15d-14(a) (CEO Certification).
31.2	Certification Pursuant to Exchange Act Rule 13a-14(a) and Rule 15d-14(a) (CFO Certification).
32	Certification Pursuant to 18 U.S.C. Section 1350 (CEO and CFO Certification).
101	The following materials from GATX Corporation’s Annual Report on Form 10-K for the year ended December 31, 2015, are formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets at December 31, 2015 and December 31, 2014, (ii) Consolidated Statements of Comprehensive Income for the years ended December 31, 2015, 2014, and 2013, (iii) Consolidated Statements of Cash Flows for the years ended December 31, 2015, 2014, and 2013, (iv) Notes to the Consolidated Financial Statements, and (v) Schedule I Condensed Financial Information of Registrant.
Incorporated by Reference:
3.1	Restated Certificate of Incorporation of GATX Corporation is incorporated herein by reference to Exhibit 3.2 to GATX’s Form 8-K dated October 31, 2013, file number 1-2328.
3.2	Amended and Restated By-Laws of GATX Corporation are incorporated herein by reference to Exhibit 3.1 of GATX’s Form 8-K dated August 5, 2015, file number 1-2328.
4.1	Indenture dated as of November 1, 2003 between GATX Financial Corporation and JP Morgan Chase Bank is incorporated herein by reference to Exhibit 4Q to GATX Financial Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003, file number 1-8319.
4.2	Indenture dated as of February 6, 2008, between GATX Corporation and U.S. Bank National Association, as Trustee, is incorporated herein by reference to Exhibit 4.12 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.
10.1	Five Year Credit Agreement with Citigroup Global Markets Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as joint lead arrangers and joint book managers, Bank of America, N.A., as syndication agent, PNC Bank, National Association, U.S. Bank, National Association, and Bayerische Landesbank, acting through its New York branch, as co-documentation agents, Citibank, N.A., as administrative agent, and the lenders party thereto is incorporated herein by reference to GATX’s Form 8-K dated May 3, 2013, file number 1-2328.
	i.	Amendment No. 1 to the Credit Agreement, dated as of July 8, 2014, among GATX Corporation, as borrower, Citigroup Global Markets Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as joint lead arrangers and joint book managers, Bank of America, N.A., as syndication agent, PNC Bank, N.A., U.S. Bank, National Association and Bayerische Landesbank, acting through its New York branch, as co-documentation agents, Citibank, N.A., as administrative agent, and the lenders party thereto is incorporated by reference to Exhibit 10.1 to GATX’s Current Report on Form 8-K dated July 11, 2014, file number 1-2328.
	ii.	Amendment No. 2 to the Credit Agreement, dated as of May 20, 2015, among GATX Corporation, as borrower, Citigroup Global Markets Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as joint lead arrangers and joint book managers, Bank of America, N.A., as syndication agent, PNC Bank, N.A., U.S. Bank, National Association and Bayerische Landesbank, acting through its New York branch, as co-documentation agents, Citibank, N.A., as administrative agent, and the lenders party thereto is incorporated by reference to Exhibit 10.1 to GATX’s Current Report on Form 10-Q dated June 30, 2015, file number 1-2328.

119

10.2	Supply Agreement by and between GATX Corporation, as Buyer, and Trinity Rail Group, LLC, as Seller, date March 14, 2011 is incorporated by reference to GATX’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2011, file number 1-2328 (Note: Portions of this document have been omitted pursuant to a Request for Confidential Treatment filed with the Securities and Exchange Commission on April 27, 2011).
	i.	First Amendment to Supply Agreement by and between GATX Corporation, as Buyer, and Trinity Rail Group, LLC, as Seller, dated April 25, 2011 is incorporated by reference to GATX’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2011, file number 1-2328.
10.3	GATX Corporation Directors’ Phantom Stock Plan, effective as of December 7, 2007, is incorporated herein by reference to Exhibit 10.31 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.
10.4	Amended and Restated GATX Corporation Directors’ Voluntary Deferred Fee Plan, effective as of December 7, 2007, is incorporated herein by reference to Exhibit 10.32 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.*
10.5	Summary of GATX Corporation Non-Employee Directors’ Compensation is incorporated herein by reference to the section entitled “Director Compensation” in GATX’s Definitive Proxy Statement filed on March 15, 2013, in connection with GATX’s 2013 Annual Meeting of Shareholders, file number 1-2328.*
10.6	GATX Corporation 2004 Equity Incentive Compensation Plan is incorporated herein by reference to Exhibit C to the Definitive Proxy Statement filed on March 18, 2004 in connection with GATX’s 2004 Annual Meeting of Shareholders, file number 1-2328.*
	i.	Amendment of said Plan, effective as of December 7, 2007, is incorporated herein by reference to Exhibit 10.28 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.*
	ii.	Second Amendment of GATX Corporation 2004 Equity Incentive Compensation Plan effective October 22, 2010.*
10.7	Restricted Stock Unit Agreement for awards made to executive officers on February 25, 2011, under the 2004 Equity Incentive Compensation Plan is incorporated herein by reference to Exhibit 10.1(a) to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2011, file number 1-2328.*
10.8	GATX Corporation 2004 Equity Incentive Compensation Plan Stock-Settled Stock Appreciation Right (SSAR) Agreement between GATX Corporation and certain executive officers entered into as of March 10, 2006 is incorporated herein by reference to Exhibit 10.1 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2006, file number 1-2328.*
10.9	GATX Corporation 2004 Equity Incentive Compensation Plan Stock-Settled Appreciation Right (SAR) Agreement between GATX Corporation and certain eligible grantees entered into as of March 8, 2007, incorporated by reference to Exhibit 10.1 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2007.*
10.10	Form of GATX Corporation Stock-Settled Stock Appreciation Right (SAR) Agreement for grants under the 2004 Equity Incentive Compensation Plan to executive officers on or after January 1, 2009, incorporated herein by reference to Exhibit 10.2 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2009, file number 1-2328.*
10.11	Form of GATX Corporation Performance Share Agreement for grants under the 2004 Equity Incentive Compensation Plan to executive officers on for after January 1, 2009, incorporated herein by reference to Exhibit 10.3 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2009, file number 1-2328.*
10.12	GATX Corporation 2012 Incentive Award Plan is incorporated herein by reference to Exhibit A to the Definitive Proxy Statement filed on March 11, 2012 in connection with GATX's 2012 Annual Meeting of Shareholders, file number 1-2328.*
10.13	GATX Corporation Cash Incentive Compensation Plan is incorporated herein by reference to Exhibit D to the Definitive Proxy Statement filed on March 18, 2004 in connection with GATX’s 2004 Annual Meeting of Shareholders, file number 1-2328.*
	i.	Amendment of said Plan, effective as of December 7, 2007, is incorporated herein by reference to Exhibit 10.30 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.*
10.14	Form of Amended and Restated Agreement for Employment Following a Change of Control dated as of January 1, 2009, between GATX Corporation and Brian A. Kenney is incorporated herein by reference to Exhibit 10.27 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2008, file number 1-2328.*
10.15	Form of Amended and Restated Agreement for Employment Following a Change of Control dated as of January 1, 2009, between GATX Corporation and Robert C. Lyons, James F. Earl, Deborah A. Golden, William M. Muckian, Michael T. Brooks, and Curt F. Glenn is incorporated herein by reference to Exhibit 10.28 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2008, file number 1-2328.*

120

10.16	Form of Agreement for Employment Following a Change of Control between GATX Corporation and James M. Conniff (dated as of February 1, 2015) and Thomas A. Ellman (dated as of January 1, 2014) is incorporated herein by reference to Exhibit 10.1 to GATX's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2015, file number 1-2328.*
10.17	Form of Agreement for Employment following a Change of Control between GATX Corporation and Eric D. Harkness (dated as of February 1, 2015), Jeffrey D. Young (dated as of February 1, 2015), and Paul F. Titterton (dated as of January 1, 2014) is incorporated by reference to Exhibit 10.3 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2015, file number 1-2328.*
10.18	Form of GATX Corporation Indemnification Agreement for directors as of February 23, 2009, is incorporated herein by reference to Exhibit 10.1 to GATX’s Form 8-K dated February 24, 2009, file number 1-2328.
10.19	Form of GATX Corporation Stock-Settled Appreciation Right (SAR) Agreement for grants to executive officers on or after January 1, 2008, is incorporated herein by reference to Exhibit 10.23 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2009, file number 1-2328.*
10.20	Form of Stock-Settled Stock Appreciation Right (SAR) Agreement for awards under the GATX Corporation 2012 Incentive Award Plan to executive officers with Agreements for Employment Following a Change of Control is incorporated by reference to Exhibit 10.24 of GATX's Annual Report on Form 10-K for the fiscal year ended December 31, 2012, file number 1-2328.*
10.21	Form of Performance Share Agreement for grants under the GATX Corporation 2012 Incentive Award Plan to executive officers with Agreements for Employment Following a Change of Control is incorporated by reference to Exhibit 10.25 of GATX's Annual Report on Form 10-K for the fiscal year ended December 31, 2012, file number 1-2328.*
10.22	Form of Performance Share Agreement with cash-election option for grants under the GATX Corporation 2012 Incentive Award Plan to executive officers with Agreements for Employment Following a Change of Control is incorporated by reference to Exhibit 10.1 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2014, file number 1-2328.*
99.1	Undertakings to the GATX Corporation Salaried Employees’ Retirement Savings Plan is incorporated herein by reference to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 1982, file number 1-2328.*
99.2	Certain instruments evidencing long-term indebtedness of GATX Corporation are not being filed as exhibits to this Report because the total amount of securities authorized under any such instrument does not exceed 10% of GATX Corporation’s total assets. GATX Corporation will furnish copies of any such instruments upon request of the Securities and Exchange Commission.

__________

(*) Compensatory Plans or Arrangements

121

EX-12

Exhibit 12

GATX CORPORATION AND SUBSIDIARIES

COMPUTATION OF RATIOS OF EARNINGS TO COMBINED FIXED CHARGES

AND PREFERRED STOCK DIVIDENDS

(In millions, except ratios)

	Year Ended December 31
	2015		2014		2013		2012		2011
Earnings available for fixed charges:
Income before income taxes and share of affiliates' earnings	$	270.3	$	231.2	$	159.0	$	143.8	$	107.6
Add:
Dividends from affiliated companies	32.2		40.0		34.4		35.1		29.2
Total fixed charges	191.5		206.6		224.1		227.0		232.6
Total earnings available for fixed charges	$	494.0	$	477.8	$	417.5	$	405.9	$	369.4
Fixed charges:
Interest expense	$	156.2	$	159.3	$	167.8	$	168.5	$	169.6
Interest portion of operating lease expense	35.3		47.3		56.0		58.5		62.9
Preferred dividends on pretax basis	—		—		0.3		—		0.1
Total fixed charges	$	191.5	$	206.6	$	224.1	$	227.0	$	232.6
Ratio of earnings to fixed charges	2.58		2.31		1.86		1.79		1.59

EX-21

Exhibit 21

SUBSIDIARIES OF THE REGISTRANT

The following is a list of subsidiaries included in our consolidated financial statements and the state or country of incorporation of each:

Company Name	State or Country of Incorporation
GATX Terminals Overseas Holding Corporation (1)	Delaware
GATX Global Finance B.V. (1)	Netherlands
GATX Global Holding GmbH (1)	Switzerland
GATX Rail Austria GmbH (1)(2)	Austria
GATX International Limited (1)(3)	United Kingdom
GATX Canada Holdings, Inc. (1)	Canada
GATX Rail Canada Corporation (1)	Canada
General American Transportation Holding Corp (1)	Delaware
Grupo GATX de Mexico, Inc (1)	Delaware
GATX de Mexico, Inc (1)	Delaware
GATX Third Aircraft LLC (4)	Delaware
American Steamship Company (5)	New York
GATX Asia Investments Private Limited (6)	Singapore
GATX Rail Locomotive Group, LLC	Delaware

__________________

(1) Company is a significant subsidiary as defined in Rule 1-02(w) of Regulation S-X.

(2) Company includes 11 foreign subsidiaries.

(3) Company includes three foreign subsidiaries.

(4) Company includes three domestic subsidiaries and six foreign subsidiaries.

(5) Company includes 14 domestic subsidiaries.

(6) Company includes seven foreign subsidiaries.

The names of certain subsidiaries which, if considered as a single subsidiary, would not constitute a “significant subsidiary” as defined in Regulation S-X, have been omitted.

EX-23

Exhibit 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (Form S-3 No. 333-190682) and related Prospectus of GATX Corporation, the Registration Statement (Form S-8 No. 333-182219) pertaining to the 2012 Incentive Award Plan, the Registration Statement (Form S-8 No. 333-116626) pertaining to the 2004 Equity Incentive Compensation Plan, the 1995 Long-Term Incentive Compensation Plan, and the 1985 Long-Term Incentive Compensation Plan, the Registration Statement (Form S-8 No. 333-145581) pertaining to the Salaried Employees Retirement Savings Plan, the Registration Statement (Form S-8 No. 33-41007) pertaining to the Salaried Employees Retirement Savings Plan, the Registration Statement (Form S-8 No. 2-92404) pertaining to the Salaried Employees Savings Plan, and the Registration Statement (Form S-8 No. 333-145583) pertaining to the Hourly Employees Retirement Savings Plan of GATX Corporation of our reports dated February 24, 2016, with respect to the consolidated financial statements and schedule of GATX Corporation and the effectiveness of internal control over financial reporting of GATX Corporation included in this Annual Report (Form 10-K) of GATX Corporation for the year ended December 31, 2015.

Chicago, Illinois

February 24, 2016

EX-24.1

Exhibit 24.1

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2015, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set her hand and seal.

/s/ ANNE L. ARVIA       

Anne L. Arvia

Director

Date: 2/20/2016

EX-24.2

Exhibit 24.2

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2015, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/ ERNST A. HÄBERLI

Ernst A. Häberli

Director

Date: 2/21/2016

EX-24.3

Exhibit 24.3

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2015, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/ BRIAN A. KENNEY      

Brian A. Kenney

Director

Date: 2/22/2016

EX-24.4

Exhibit 24.4

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2015, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/ JAMES B. REAM

James B. Ream

Director

Date: 2/17/2016

EX-24.5

Exhibit 24.5

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2015, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/ ROBERT J. RITCHIE   

Robert J. Ritchie

Director

Date: 2/18/2016

EX-24.6

Exhibit 24.6

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2015, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/ DAVID S. SUTHERLAND

David S. Sutherland

Director

Date: 2/20/2016

EX-24.7

Exhibit 24.7

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2015, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/ CASEY J. SYLLA

Casey J. Sylla

Director

Date: 2/19/2016

EX-24.8

Exhibit 24.8

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2015, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/ STEPHEN R. WILSON

Stephen R. Wilson

Director

Date: 2/17/2016

EX-24.9

Exhibit 24.9

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2015, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/ PAUL G. YOVOVICH

Paul G. Yovovich

Director

Date: 2/17/2016

EX-31.1

Exhibit 31.1

Certification of Principal Executive Officer

I, Brian A. Kenney, certify that:

1. I have reviewed this Annual Report on Form 10-K of GATX Corporation (the "Company");

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods presented in this report;

4. The Company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Company’s internal control over financial reporting that occurred during the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting; and

5. The Company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Company’s auditors and the audit committee of the Company’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Company’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Company’s internal control over financial reporting.

/s/    BRIAN A. KENNEY        

Brian A. Kenney

Chairman, President and Chief Executive Officer

February 24, 2016

EX-31.2

Exhibit 31.2

Certification of Principal Financial Officer

I, Robert C. Lyons, certify that:

1. I have reviewed this Annual Report on Form 10-K of GATX Corporation (the "Company");

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods presented in this report;

4. The Company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Company’s internal control over financial reporting that occurred during the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting; and

5. The Company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Company’s auditors and the audit committee of the Company’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Company’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Company’s internal control over financial reporting.

/s/    ROBERT C. LYONS        

Robert C. Lyons

Executive Vice President and Chief Financial Officer

February 24, 2016

EX-32

Exhibit 32

GATX CORPORATION AND SUBSIDIARIES

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Annual Report of GATX Corporation (the “Company”) on Form 10-K for the period ending December 31, 2015, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/    BRIAN A. KENNEY	/s/    ROBERT C. LYONS
Brian A. Kenney	Robert C. Lyons
Chairman, President and Chief Executive Officer	Executive Vice President and Chief Financial Officer

February 24, 2016

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed filed by GATX Corporation for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

A signed original of this written statement required by Section 906 has been provided to GATX Corporation and will be retained by GATX Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

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Document and Entity Information - USD ($) shares in Millions, $ in Billions	12 Months Ended
	Dec. 31, 2015	Jan. 31, 2016	Jun. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	GATX Corporation
Entity Central Index Key	0000040211
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 2.3
Entity Common Stock, Shares Outstanding		42.1

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Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and Cash Equivalents	$ 202.4	$ 209.9
Restricted Cash	17.3	14.5
Receivables
Rent and other receivables	69.4	86.0
Loans	8.8	97.3
Finance leases	167.6	174.7
Less: allowance for losses	(10.3)	(5.7)
Receivables, net	235.5	352.3
Operating Assets and Facilities
Operating Assets and Facilities ($122.9 and $123.1 related to a consolidated VIE)	8,204.0	8,143.5
Less: allowance for depreciation ($39.7 and $35.0 related to a consolidated VIE)	(2,505.6)	(2,455.5)
Operating assets and facilities, net	5,698.4	5,688.0
Investments in Affiliated Companies	348.5	357.7
Goodwill	79.7	86.1
Other Assets	312.4	211.4
Total Assets	6,894.2	6,919.9
Liabilities and Shareholders’ Equity
Accounts Payable and Accrued Expenses	170.9	165.9
Debt
Commercial paper and borrowings under bank credit facilities	7.4	72.1
Recourse	4,171.5	4,162.3
Nonrecourse ($6.9 and $15.9 related to a consolidated VIE)	(6.9)	(15.9)
Capital lease obligations	18.4	6.3
Total Debt	4,204.2	4,256.6
Deferred Income Taxes	1,018.3	937.3
Other Liabilities	220.6	246.1
Total Liabilities	5,614.0	5,605.9
Shareholders’ Equity
Common stock, $0.625 par value: Authorized shares — 120,000,000 Issued shares — 66,776,290 and 66,600,984 Outstanding shares — 41,970,098 and 44,198,850	(41.5)	(41.4)
Additional paid in capital	(677.4)	(672.8)
Retained earnings	1,639.0	1,501.7
Accumulated other comprehensive loss	198.8	148.4
Treasury stock at cost (24,806,192 and 22,402,134 shares)	(878.9)	(753.5)
Total Shareholders’ Equity	1,280.2	1,314.0
Total Liabilities and Shareholders’ Equity	$ 6,894.2	$ 6,919.9

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
VIE for Rail	$ 8,204.0	$ 8,143.5
VIE depreciation allowance	2,505.6	2,455.5
VIE nonrecourse debt	$ 6.9	$ 15.9
Common stock, par value	$ 0.625	$ 0.625
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	66,776,290.000000	66,600,984
Common stock, shares outstanding	41,970,098	44,198,850
Treasury stock, shares outstanding	24,806,192	22,402,134
Variable Interest Entity, Primary Beneficiary [Member]
VIE for Rail	$ 122.9	$ 123.1
VIE depreciation allowance	39.7	35.0
VIE nonrecourse debt	$ 6.9	$ 15.9

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Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Revenues
Lease revenue	$ 1,130.1	$ 1,086.6		$ 975.2
Marine operating revenue	235.0	286.3		275.1
Other revenue	84.8	78.1		70.7
Total Revenues	1,449.9	1,451.0		1,321.0
Expenses
Maintenance expense	326.1	337.0		294.0
Marine operating expense	155.9	197.8		189.8
Depreciation	290.5	273.5		255.0
Operating lease expense	87.2	108.7		129.4
Other operating expense	38.4	28.9		26.1
Selling, general and administrative	192.4	189.2		178.3
Total Expenses	1,090.5	1,135.1		1,072.6
Other Income (Expense)
Net gain on asset dispositions	79.2	87.2		85.6
Interest expense, net	(155.1)	(158.4)		(166.6)
Other (expense) income	(13.2)	(13.5)		(8.4)
Income before Income Taxes and Share of Affiliates’ Earnings	270.3	231.2		159.0
Income Taxes	(110.9)	(75.7)		(65.5)
Share of Affiliates’ Earnings (net of tax)	45.9	49.5		75.8
Net Income	205.3	205.0		169.3
Other Comprehensive Income, net of taxes
Foreign currency translation adjustments	55.8	79.1		(25.8)
Unrealized gain (loss) on securities	0.6	0.1		(0.8)
Unrealized gain (loss) on derivative instruments	1.8	(3.0)		(22.4)
Post-retirement benefit plans	7.8	(29.5)		52.9
Other comprehensive income (loss)	(50.4)	(105.7)		101.9
Comprehensive Income	$ 154.9	$ 99.3		$ 271.2
Share Data
Basic earnings per share (in dollars per share)	$ 4.76	$ 4.55	[1]	$ 3.64
Average number of common shares (in shares)	43.1	45.0		46.4
Diluted earnings per share (in dollars per share)	$ 4.69	$ 4.48	[1]	$ 3.59
Average number of common shares and common share equivalents (in shares)	43.8	45.8		47.1
Dividends declared per common share (in dollars per share)	$ 1.52	$ 1.32		$ 1.24

[1] (1)Quarterly earnings per share may not be additive, as per share amounts are computed independently for each quarter and the full year is based on the respective weighted average common shares and common stock equivalents outstanding.(2)In the third quarter of 2015, net income included $31.1 million of net impairment losses and $4.5 million of net disposition gains, both related to the decision to exit the majority of the marine investments within the Portfolio Management segment.(3)In the fourth quarter of 2015, net income included $9.0 million of net disposition gains related to the decision to exit the majority of the marine investments within the Portfolio Management segment. In addition, we recorded $14.1 million of expense attributable to an increase in our effective state income tax rate, $7.7 million of benefit resulting from a reduction in the statutory income tax rate in the UK, and $5.6 million of net expenses associated with an early retirement program offered to certain employees.

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Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities
Net income	$ 205.3	$ 205.0	$ 169.3
Adjustments to reconcile income to net cash provided by operating activities:
Depreciation	303.3	287.0	267.8
Share-based Compensation	11.6	14.0	13.1
Asset impairment charges	(33.9)	(1.3)	(5.9)
Gains on sales of assets	(99.7)	(79.3)	(80.7)
Deferred income taxes	90.2	61.4	53.6
Share of affiliates’ earnings, net of dividends	(13.7)	(9.5)	(41.4)
Change in income taxes payable	7.4	(4.4)	4.5
Change in accrued operating lease expense	(24.2)	(5.2)	(7.7)
Employee benefit plans	10.6	3.7	7.5
Other	9.6	(24.8)	8.8
Net cash provided by operating activities	534.3	449.2	400.7
Investing Activities
Additions to operating assets and facilities	(681.4)	(1,015.2)	(744.1)
Loans extended	0.0	0.0	(14.2)
Investments in affiliates	(15.5)	(15.3)	(101.3)
Portfolio investments and capital additions	(696.9)	(1,030.5)	(859.6)
Purchases of leased-in assets	(118.4)	(150.5)	(61.4)
Portfolio proceeds	482.2	264.0	385.3
Proceeds from sales of other assets	18.7	26.9	32.3
Proceeds from sale-leasebacks	0.0	0.0	90.7
Net decrease (increase) in restricted cash	(2.9)	5.8	9.5
Payments for (Proceeds from) Other Investing Activities	9.7	5.8	0.0
Net cash used in investing activities	(307.6)	(878.5)	(403.2)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	748.8	1,223.0	1,132.2
Repayments of debt (original maturities longer than 90 days)	(726.3)	(819.8)	(602.8)
Net increase (decrease) in debt with original maturities of 90 days or less	(64.5)	50.0	(251.3)
Payments on capital lease obligations	(2.7)	(2.6)	(2.4)
Stock repurchases	(125.4)	(124.6)	(68.6)
Dividends	(68.2)	(62.0)	(60.5)
Other	(9.3)	(1.8)	(2.5)
Net cash (used in) provided by financing activities	(229.0)	262.2	149.1
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(5.2)	(2.7)	(1.1)
Net (decrease) increase in Cash and Cash Equivalents during the period	(7.5)	(169.8)	145.5
Cash and Cash Equivalents at beginning of period	209.9	379.7	234.2
Cash and Cash Equivalents at end of period	$ 202.4	$ 209.9	$ 379.7

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Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions	Total	Common stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period, Shares			(19,100,000)
Balance at beginning of year at Dec. 31, 2012		66,000,000
Balance at beginning of period, Common Stock at Dec. 31, 2012		$ 41.2
Balance at beginning of period at Dec. 31, 2012			$ (560.3)	$ 658.5	$ 1,249.4	$ (144.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, Shares		300,000
Issuance of common stock		$ 0.1		1.1
Stock repurchases, Shares	1,400,000
Stock repurchases	$ (68.6)
Share-based compensation effects				9.3
Net income	169.3				169.3
Dividends declared					(60.3)
Other comprehensive income (loss)	101.9
Balance at end of period, Common Stock, Shares at Dec. 31, 2013		66,300,000
Balance at end of period, Common Stock at Dec. 31, 2013		$ 41.3
Balance at end of period at Dec. 31, 2013	$ 1,397.0		$ (628.9)	668.9	1,358.4	(42.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period, Shares			(20,500,000)
Issuance of common stock, Shares		300,000
Issuance of common stock		$ 0.1		0.0
Stock repurchases, Shares	1,900,000
Stock repurchases	$ (124.6)
Share-based compensation effects				3.9
Net income	205.0				205.0
Dividends declared					(61.7)
Other comprehensive income (loss)	$ (105.7)					(105.7)
Balance at end of period, Common Stock, Shares at Dec. 31, 2014	66,600,984	66,600,000
Balance at end of period, Common Stock at Dec. 31, 2014	$ 41.4	$ 41.4
Balance at end of period at Dec. 31, 2014	$ 1,314.0		$ (753.5)	672.8	1,501.7	(148.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period, Shares			(22,400,000)
Issuance of common stock, Shares		200,000
Issuance of common stock		$ 0.1		0.0
Stock repurchases, Shares	2,400,000
Stock repurchases	$ (125.4)
Share-based compensation effects				4.6
Net income	205.3
Dividends declared					(68.0)
Other comprehensive income (loss)	$ (50.4)
Balance at end of period, Common Stock, Shares at Dec. 31, 2015	66,776,290.000000	66,800,000
Balance at end of period, Common Stock at Dec. 31, 2015	$ 41.5	$ 41.5
Balance at end of period at Dec. 31, 2015	$ 1,280.2		$ (878.9)	$ 677.4	$ 1,639.0	$ (198.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period, Shares			(24,800,000)

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Description of Business

12 Months Ended

Dec. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business

Description of Business

As used herein, "GATX," "we," "us," "our," and similar terms refer to GATX Corporation and its subsidiaries, unless indicated otherwise.

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail market. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”), and Portfolio Management.

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Accounting Changes

12 Months Ended

Dec. 31, 2015

Accounting Changes and Error Corrections [Abstract]

Accounting Changes

Change in Accounting Estimate

At the end of 2015, we changed the approach used to measure service and interest costs for pension and other postretirement benefits. For 2015, the Company measured service and interest costs utilizing a single weighted-average discount rate derived from the yield curve used to measure the plan obligations. For 2016, we will measure service and interest costs by applying the specific spot rates along that yield curve to the plans’ liability cash flows. The Company believes the new approach provides a more precise measurement of service and interest costs by aligning the timing of the plans’ liability cash flows to the corresponding spot rates on the yield curve. This change does not affect the measurement of our plan obligations. The Company has accounted for this change as a change in accounting estimate and, accordingly, has accounted for it on a prospective basis.

In 2014, we completed a review of the estimated useful lives used for our North American railcar fleet and determined that the economic service life of many of our railcars differed from the useful life that was used to calculate depreciation. As a result, effective January 1, 2014, we revised the estimated useful lives from a range of 30-38 years to a range of 27-42 years. In aggregate, the average depreciable life of the fleet increased approximately 2.2 years. The impacts of these implemented changes on depreciation expense for affected assets was a net decrease in depreciation expense of approximately $21.9 million and an increase in net income of $14.0 million, or $0.31 per diluted share for the year ended December 31, 2014.

New Accounting Pronouncements Adopted

Debt Issue Costs

As of December 31, 2015, the Company elected to early adopt Accounting Standards Update ("ASU") 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs, which requires presentation of debt issue costs as a deduction from the carrying amount of the related debt liability on the balance sheet, rather than as a deferred charge. Adoption of the new guidance did not impact the amount or timing of net income but required us to reclassify deferred debt issuance costs ($18.8 million in 2015 and $17.6 million in 2014), which were previously included in other assets, to a reduction in the carrying amount of our related debt balances.

Discontinued Operations

In April 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Components of an Entity. The amendments require that disposals representing strategic shifts that have (or will have) a major effect on an entity’s operations or financial results should be reported in discontinued operations. The amendments also expand the disclosure requirements for both discontinued operations and significant dispositions that do not qualify as discontinued operations.

The amendments were effective for us beginning in the first quarter of 2015. Adoption of the new guidance did not impact the amount or timing of net income or the presentation and disclosures of our financial statements.

New Accounting Pronouncements Not Yet Adopted

Consolidation

In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810) Amendments to the Consolidation Analysis, which amends the analysis required to determine whether to consolidate certain types of legal entities such as limited partnerships, limited liability corporations, and certain securitization structures. The new guidance is effective for us beginning in the first quarter of 2016, with early adoption permitted. Application of the new guidance will not impact our financial statements and related disclosures.

Business Combinations

In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805), Simplifying the Accounting for Measurement-Period Adjustments, which requires the acquirer in a business combination to recognize measurement-period adjustments in the period in which it determines the amount of the adjustment. The new guidance is effective for us in the first quarter of 2016, with early adoption permitted. We do not expect the new guidance to have a significant impact on our financial statements and related disclosures.

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes most current revenue recognition guidance, including industry-specific guidance. The new guidance requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration it expects to be entitled to in exchange for those goods or services.

In August 2015, the FASB deferred the effective date of this standard from the first quarter of 2017 to the first quarter of 2018. Early adoption is permitted as of the original effective date. We can adopt the new guidance using either the retrospective method or the cumulative effect transition method. We are still evaluating the effect that the new guidance will have on our consolidated financial statements and related disclosures, including which transition method we will use and when we will choose to adopt this standard.

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Significant Accounting Policies

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

Basis of Presentation

We prepared the accompanying consolidated financial statements in accordance with US generally accepted accounting principles ("GAAP"). Certain prior year amounts may have been reclassified to conform to the 2015 presentation.

Use of Estimates

Preparing financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the amounts we report. We regularly evaluate our estimates and judgments based on historical experience and other relevant facts and circumstances. Actual amounts could differ from our estimates.

Consolidation

Our consolidated financial statements include our assets, liabilities, revenues, and expenses, as well as the assets, liabilities, revenues, and expenses of subsidiaries in which we have a controlling financial interest and variable interest entities for which we are the primary beneficiary. We have eliminated intercompany transactions and balances. Our consolidated subsidiaries include the following wholly owned, bankruptcy-remote special purpose corporations that finance and lease railcars: General American Railcar Corporation, General American Railcar Corporation III, General American Marks Company, and GARC LLC. The debt and lease obligations of these special purpose corporations are nonrecourse to us, and their assets are available first to satisfy claims of their creditors. 

Investments in Affiliates

We use the equity method to account for investments in joint ventures and other unconsolidated entities if we have the ability to exercise significant influence over the financial and operating policies of those investees. Under the equity method, we record our initial investments in these entities at cost and subsequently adjust the investment for our share of the affiliates’ undistributed earnings (losses), and distributions. We include loans to and from affiliates as part of our investment in the affiliate and include interest on any such loans in our share of the affiliates’ earnings. We review the carrying amount of our investments in affiliates annually, or whenever circumstances indicate that the value of these investments may have declined. If we determine an investment is impaired on an other-than-temporary basis, we record a loss equal to the difference between the fair value of the investment and its carrying value. See "Note 7. Investments in Affiliated Companies."

Variable Interest Entities

We evaluate whether an entity is a variable interest entity based on the sufficiency of the entity’s equity and by determining whether the equity holders have the characteristics of a controlling financial interest. To determine if we are the primary beneficiary of a variable interest entity, we assess whether we have the power to direct the activities that most significantly impact the economic performance of the entity as well as the obligation to absorb losses or the right to receive benefits that may be significant to the entity. These determinations are both qualitative and quantitative, and they require us to make judgments and assumptions about the entity’s forecasted financial performance and the volatility inherent in those forecasted results. We evaluate new investments for variable interest entity determination and regularly review all existing entities for events that may result in an entity becoming a variable interest entity or us becoming the primary beneficiary of an existing variable interest entity. See "Note 8. Variable Interest Entities."

Fair Value Measurements

Fair value is the price that a market participant would receive to sell an asset or pay to transfer a liability in an orderly transaction at the measurement date. We classify fair value measurements according to the three-level hierarchy defined by GAAP, and those classifications are based on our judgment about the reliability of the inputs we use in the fair value measurement. Level 1 inputs are quoted prices available in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly, and may include quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data. For assets or liabilities with a specified contractual term, Level 2 inputs must be observable for substantially the full term of that asset or liability. Level 3 inputs are unobservable, meaning they are supported by little or no market activity. Fair value measurements classified as Level 3 typically rely on pricing models and discounted cash flow methodologies, both of which require significant judgment. See "Note 10. Fair Value Disclosure."

Cash and Cash Equivalents

We classify all highly liquid investments with a maturity of three months or less when purchased as cash equivalents.

Restricted Cash

Restricted cash is cash and cash equivalents that are restricted as to withdrawal and use. Our restricted cash primarily relates to contractually required cash amounts we maintain for two wholly owned bankruptcy-remote, special purpose corporations.

Operating Assets and Facilities

We state operating assets, facilities, and capitalized improvements at cost. We include assets we acquire under capital leases in operating assets, and we record the related obligations as liabilities. We depreciate operating assets and facilities over their estimated useful lives or lease terms to estimated residual values using the straight-line method. We depreciate leasehold improvements over the shorter of their useful lives or the lease term. Our estimated depreciable lives of operating assets and facilities are as follows:

Railcars	20–42 years
Locomotives	10–20 years
Buildings	40–50 years
Leasehold improvements	5–15 years
Marine vessels	30–65 years
Other equipment	5–30 years

We review long-lived assets for impairment whenever circumstances indicate that the carrying amount of those assets may not be recoverable. We evaluate the recoverability of assets to be held and used by comparing the carrying amount of the asset to the undiscounted future net cash flows we expect the asset to generate. If we determine an asset is impaired, we recognize an impairment loss equal to the amount the carrying amount exceeds the asset’s fair value. We classify assets we plan to sell or otherwise dispose of as held for sale, provided they meet specified accounting criteria, and we record those assets at the lower of their carrying amount or fair value less costs to sell.

Lease Classification

We determine the classification of a lease at its inception. If the provisions of the lease subsequently change, other than by renewal or extension, we evaluate whether that change would have resulted in a different lease classification had the change been in effect at inception. If so, the revised agreement is considered a new lease for lease classification purposes. See "Note 5. Leases."

Operating Leases

We offer full-service and net operating leases. We price full-service leases as an integrated service that includes amounts related to executory costs, such as maintenance, insurance, and ad valorem taxes. We do not offer stand-alone maintenance service contracts and are unable to separate executory costs from full-service lease revenue. We recognize operating lease revenue, including amounts related to executory costs, on a straight-line basis over the term of the underlying lease. As a result, we may not recognize lease revenue in the same period as maintenance and other executory costs, which we expense as incurred. See "Note 5. Leases."

Finance Leases

For finance leases, we record a gross lease payment receivable and an estimated residual value, net of unearned income. For sales-type leases, we may also recognize a gain or loss in the period the lease is recorded. Gross lease payment receivables are the rents we expect to receive through the end of the lease term for a leased asset. Estimated residual values are our estimates of value of an asset at the end of a finance lease term. We review our estimates of residual values annually or whenever circumstances indicate that residual values may have declined. Other-than-temporary declines in value are recognized as impairments. Initial unearned income is the amount that the original lease payment receivable and the estimated residual value of the leased asset exceeds the original cost or carrying value of the leased asset. We amortize unearned income to lease revenue using the interest method, which produces a constant yield over the lease term. We also defer the initial direct costs related to our direct finance leases and amortize those costs over the lease term as an adjustment to lease revenue.

We regularly review the finance lease portfolio and classify finance leases as non-performing if it is probable that we will be unable to collect all amounts due under the lease. We generally stop accruing income on non-performing finance leases until all contractual payments are current. We apply payments we receive for non-performing finance leases to the lease payment receivable. See "Note 5. Leases."

Inventory

Our inventory consists of railcar and locomotive repair components and marine vessel spare parts. All inventory balances are stated at lower of cost or market. Railcar repair components are valued using the average cost method. Vessel spare parts inventory is valued using the first-in, first-out method. Inventory is included in other assets on the balance sheet.

Loans

We record loans at their principal amount outstanding adjusted for allowances, deferred fees, unamortized premiums or discounts, and accrued interest. We review the loan portfolio regularly and classify a loan as impaired when it is probable that we will be unable to collect all amounts due under the loan agreement. Since most loans are collateralized, we generally measure impairment as the amount the carrying value of the loan exceeds the expected repayments, including any value attributable to underlying collateral. We do not typically recognize interest income on impaired loans until the loan has been paid to contractually current status. We offset loan origination fees by the related direct loan origination costs for a given loan and amortize the net amount of those costs over the term of the loan as an adjustment to interest income. See "Note 6. Loans."

Allowance for Losses

The allowance for losses is our estimate of credit losses associated with reservable assets. Reservable assets are divided into two categories: rent and other receivables, which includes short-term trade billings, and loans and finance lease receivables. We base our loss reserves for rent and other receivables on historical loss experience and judgments about the impact of economic conditions, the state of the markets we operate in, and collateral values, if applicable. In addition, we may establish specific reserves for known troubled accounts. We evaluate reserve estimates for loans and finance lease receivables on a customer-specific basis, considering each customer's particular credit situation. We also consider the factors we use to evaluate rent and other receivables, which are outlined above. We charge amounts against the allowance when we deem them uncollectable. We made no material changes in our estimation methods or assumptions for the allowance during 2015. We believe that the allowance is adequate to cover losses inherent in our reservable assets as of December 31, 2015. Since the allowance is based on judgments and estimates, it is possible that actual losses incurred will differ from the estimate. See "Note 19. Allowance for Losses."

Goodwill

We recognize goodwill when the consideration paid to acquire a business exceeds the fair value of the net assets acquired.  We assign goodwill to the same reporting unit as the net assets of the acquired business and we assess our goodwill for impairment on an annual basis in the fourth quarter, or during interim periods if impairment indicators are present. If the carrying amount of the applicable reporting unit exceeds its fair value, we compare the implied fair value of the reporting unit’s goodwill with the carrying amount of goodwill. We record an impairment loss if the carrying amount of goodwill exceeds its implied fair value. The fair values of our reporting units are determined using discounted cash flow models. See "Note 18. Goodwill."

Income Taxes

We calculate provisions for federal, state, and foreign income taxes on our reported income before income taxes. We base our calculations of deferred tax assets and liabilities on the differences between the financial statement and tax bases of assets and liabilities, using enacted rates in effect for the year we expect the differences will reverse. We reflect the cumulative effect of changes in tax rates from those we previously used to determine deferred tax assets and liabilities in the provision for income taxes in the period the change is enacted. Provisions for income taxes in any given period differ from those currently payable or receivable because certain items of income and expense are recognized in different periods for financial reporting purposes than for income tax purposes. We may deduct expenses or defer income attributable to uncertain tax positions for tax purposes, however, we have not recognized a tax benefit in the financial statements for those items. We include our liability for uncertain tax positions in other liabilities on the balance sheet. See "Note 14. Income Taxes."

Derivatives

We use derivatives, such as interest rate swap agreements, Treasury rate locks, options, and currency forwards, to hedge our exposure to interest rate and foreign currency exchange rate risk on existing and anticipated transactions. We formally designate derivatives that meet specific accounting criteria as qualifying hedges at inception. These criteria require us to have the expectation that the derivative will be highly effective at offsetting changes in the fair value or expected cash flows of the hedged exposure, both at the inception of the hedging relationship and on an ongoing basis.

We recognize all derivative instruments at fair value and classify them on the balance sheet as either other assets or other liabilities. We generally base the classification of derivative activity in the statements of comprehensive income and cash flows on the nature of the hedged item. For derivatives we designate as fair value hedges, we recognize changes in the fair value of both the derivative and the hedged item in earnings. For derivatives we designate as cash flow hedges, we record the effective portion of the change in the fair value of the derivative as part of other comprehensive income (loss), and we recognize those changes in earnings in the period the hedged transaction affects earnings. We recognize any ineffective portion of the change in the fair value of the derivative immediately in earnings. Although we do not hold or issue derivative financial instruments for purposes other than hedging, we do not designate certain derivatives as accounting hedges. We recognize changes in the fair value of these derivatives in earnings immediately. We classify gains and losses on derivatives that are not designated as hedges as other expenses, and we include the related cash flows in cash flows from operating activities. See "Note 10. Fair Value Disclosure."

Defined Benefit Pension and Other Post-Retirement Plans

Our balance sheet reflects the funded status of our pension and post-retirement plans, which is the difference between the fair value of the plan assets and the projected benefit obligation. We recognize the aggregate overfunding of any plans in other assets, the aggregate underfunding of any plans in other liabilities, and the corresponding adjustments for unrecognized actuarial gains (losses) and prior service cost (credits) in accumulated other comprehensive income (loss). See "Note 12. Pension and Other Post-Retirement Benefits."

Foreign Currency

We translate the assets and liabilities of our operations that have non-US dollar functional currencies at exchange rates in effect at year-end. Revenue, expenses, and cash flows are translated monthly using average exchange rates. We defer gains and losses resulting from foreign currency translation and record those gains and losses as a separate component of accumulated other comprehensive income (loss). Gains and losses resulting from foreign currency transactions and from the remeasurement of non-functional currency assets and liabilities are recorded net of related hedges in other expense during the periods in which they occur. Net gains (losses) were $1.1 million, $(3.4) million and $2.1 million for 2015, 2014, and 2013.

Environmental Liabilities

We record accruals for environmental remediation costs at sites relating to past or discontinued operations when they are probable and when we can reasonably estimate the expected costs. We record adjustments to initial estimates as necessary. Since these accruals are based on estimates, actual environmental remediation costs may differ. We expense or capitalize environmental remediation costs related to current or future operations as appropriate. See "Note 24. Legal Proceedings and Other Contingencies."

Marine Operating Revenue

We recognize marine operating revenue as we perform shipping services, and we allocate revenue among reporting periods based on the relative transit time in each reporting period for shipments in process.

Other Revenue

We include customer liability repair revenue, fee income, interest on loans, and other miscellaneous revenues in other revenue. We recognize these revenues when earned, which, in the case of management fees we receive from affiliates, is when we perform the related services.

Interest Expense, net

Interest expense is the interest we accrue on indebtedness and the amortization of debt issuance costs and debt discounts and premiums. We defer debt issuance costs and debt discounts and premiums and amortize them over the term of the related debt. We report interest expense net of interest income on bank deposits. Interest income on bank deposits was $1.1 million in 2015, $0.9 million in 2014, and $1.2 million in 2013.

Operating Lease Expense

We classify leases of certain railcars and other assets and facilities, such as maintenance facilities and equipment, as operating leases. We record the lease expense associated with these leases on a straight-line basis. We defer gains and financing costs associated with sale-leasebacks and amortize those gains and costs as a component of operating lease expense over the related leaseback term. We also classify our leases of office facilities and related administrative assets as operating leases, and we record the associated expense in selling, general and administrative expense. See "Note 5. Leases."

Maintenance and Repair Costs

We expense maintenance and repair costs as incurred. We capitalize certain costs incurred in connection with planned major maintenance activities if those activities improve the asset or extend its useful life. We depreciate those capitalized costs over the estimated useful life of the improvement. We capitalize required regulatory survey costs for vessels and amortize those costs over the applicable survey period, which is generally five years.

ASC Expense Seasonality

ASC's sailing season runs from April 1 to December 31 of each year. We defer certain indirect expenses incurred prior to the beginning of the sailing season, such as winter maintenance, insurance, operating lease expense, and depreciation and amortize them ratably over the sailing season.

Share-Based Compensation

We base our measurement of share-based compensation expense on the grant date fair value of an award, and we recognize the expense net of estimated forfeitures over the requisite service period. Forfeiture rates at grant date are initially based on historical experience and are adjusted in subsequent periods if actual experience differs from the estimate. We record a final adjustment when those awards vest. See "Note 13. Share-Based Compensation."

Net Gain on Asset Dispositions

Net gain on disposition includes gains and losses on sales of operating assets and residual sharing income, which we also refer to as asset remarketing income; non-remarketing disposition gains, primarily from scrapping of railcars; and asset impairment losses. We recognize disposition gains, including non-remarketing gains, upon completion of the sale or scrapping of operating assets. Residual sharing income includes fees we receive from the sale of managed assets and assets subject to residual value guarantees, and we recognize these fees upon completion of the underlying transactions.

The following table presents the net gain on asset dispositions for the years ending December 31 (in millions):

	2015			2014			2013
Disposition gains	$	90.3		$	63.1		$	60.0
Residual sharing income	13.4			9.4			10.8
Non-remarketing disposition gains	9.4			16.0			20.7
Asset impairment losses (1)	(33.9		)	(1.3		)	(5.9		)
Net Gain on Asset Dispositions	$	79.2		$	87.2		$	85.6

__________

(1) See "Note 11. Asset Impairments"for further information about asset impairment losses.

Other Income (Expense)

We include fair value adjustments on certain financial instruments, gains and/or losses on foreign currency transactions and remeasurements, legal defense costs and litigation settlements, along with other miscellaneous income and expense items in other income (expense).

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Supplemental Cash Flow and Noncash Investing Transactions

12 Months Ended

Dec. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow and Noncash Investing Transaction

Supplemental Cash Flow Information and Noncash Investing Transactions

	2015		2014		2013
Supplemental Cash Flow Information (in millions)
Interest paid (1)	$	144.4	$	142.6	$	148.7
Income taxes paid, net	13.3		18.7		7.4

________

(1) Interest paid consisted of interest on debt obligations, interest rate swaps (net of interest received), and capital leases. The interest expense we capitalized as part of the cost of construction of major assets was immaterial for all periods presented.

	2015		2014		2013
Noncash Investing Transactions (in millions)
Capital lease (1)	$	17.8	$	—	$	—
Distributions from affiliates (2)	—		1.1		174.7
Portfolio proceeds (3)	—		—		91.1

________

(1) In 2015, we acquired all of the rights and obligations of 157 rail cars, classified as a capital lease in the amount of $17.8 million, which included the assumption of a capital lease obligation in the amount of $14.8 million.

(2) In 2014, we received distributions of 62 railcars with a fair value of $1.1 million from our Southern Capital Corporation LLC affiliate ("SCC"). In 2013, we received five vessels and related working capital with a fair value of $151.8 million in connection with our disposition of the Singco Gas Pte, Limited ("Singco") and Somargas II Pte Limited ("Somargas") joint ventures. Additionally, we received distributions of 640 railcars with a fair value of $22.9 million from SCC.

(3) In 2013 proceeds from the sale of our interest in Ahaus Alstätter Eisenbahn Cargo AG (“AAE”) included receipt of a €67.5 million ($91.1 million) note.

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Leases

12 Months Ended

Dec. 31, 2015

Leases [Abstract]

Leases

GATX as Lessor

The following table shows the components of our direct finance leases as of December 31 (in millions):

	2015			2014
Total contractual lease payments receivable	$	199.6		$	204.8
Estimated unguaranteed residual value of leased assets	58.7			68.5
Unearned income	(90.7		)	(98.6		)
Finance leases	$	167.6		$	174.7

Usage rents

We base lease revenue for certain operating leases on equipment usage. Lease revenue from such usage rents was $91.2 million in 2015, $83.9 million in 2014, and $21.3 million in 2013. The increases in 2015 and 2014 were due to higher utilization revenue as a result of the acquisition of approximately 18,500 boxcars in 2014.

Initial direct costs

Deferred initial direct costs related to direct financing leases were $0.1 million at December 31, 2015 and $0.3 million, at December 31, 2014.

Future receipts

The following table shows our future contractual receipts from finance leases and noncancelable operating leases as of December 31, 2015 (in millions):

	Finance Leases		Operating Leases (1)		Total
2016	$	28.3	$	970.3	$	998.6
2017	25.9		815.1		841.0
2018	23.9		684.3		708.2
2019	22.6		568.1		590.7
2020	21.1		442.6		463.7
Years thereafter	77.8		912.2		990.0
	$	199.6	$	4,392.6	$	4,592.2

__________

(1) The future contractual receipts due under our full-service operating leases include executory costs such as maintenance, car taxes, and insurance.

GATX as Lessee

Capital Lease Assets

The following table shows assets we financed with capital lease obligations as of December 31 (in millions):

	2015			2014
Railcars	$	17.8		$	—
Marine vessels	84.5			83.1
Less: allowance for depreciation	(79.8		)	(75.3		)
	$	22.5		$	7.8

Operating Leases

We lease assets that are closely associated with our revenue generating operations. At December 31, 2015 we leased approximately 19,000 railcars at Rail North America and one vessel at ASC. In addition, we lease office facilities and other general purpose equipment. Total operating lease expense, which includes amounts recorded in selling, general and administrative expense, was $91.2 million in 2015, $112.9 million in 2014, and $134.0 million in 2013.

Lease Obligations

For some leases, we have the option to renew the leases or purchase the assets at the end of the lease term. The specific terms of the renewal and purchase options vary, and we did not include these amounts in our future contractual rental payments. Additionally, the contractual rental payments do not include amounts we are required to pay for licenses, taxes, insurance, and maintenance. The following table shows our future contractual rental payments due under noncancelable leases as of December 31, 2015 (in millions):

	Capital Leases			Recourse Operating Leases
2016	$	4.3		$	85.1
2017	2.8			91.7
2018	1.6			83.0
2019	11.5			79.8
2020	—			72.7
Years thereafter	—			244.0
	$	20.2		$	656.3
Less: amounts representing interest	(1.8		)
Present value of future contractual capital lease payments	$	18.4

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Investments in Affiliated Companies

12 Months Ended

Dec. 31, 2015

Equity Method Investments and Joint Ventures [Abstract]

Investments in Affiliated Companies

Investments in affiliated companies represent investments in and loans to domestic and foreign affiliates, and primarily include companies offering lease financing and related services for customers operating rail and marine assets, as well as entities that lease aircraft spare engines. Loan amounts included in investments in affiliated companies were $11.2 million as of December 31, 2015 and $16.3 million as of December 31, 2014.

In 2015, as a result of our decision to exit the majority of our marine investments within our Portfolio Management segment, we recorded a $19.0 million impairment loss and then sold our 50% interest in the Cardinal Marine joint venture. We received aggregate cash proceeds of $24.7 million from this sale.

In 2014, we sold our investments in the Intermodal Investment Fund V and Intermodal Investment Fund VII affiliates. As a result of these sales, we received aggregate cash proceeds of $18.3 million.

In 2013, we dissolved our Singco and Somargas marine affiliates, taking direct ownership of five liquefied gas carrying vessels with a fair value of $151.8 million. In connection with the dissolution we paid $101.3 million, primarily to satisfy our share of the affiliates' external debt, and recognized a pretax gain of $2.5 million, which is recorded in share of affiliates' earnings. The vessels continue to operate in a vessel pooling arrangement that our former partner manages.

In 2013, we sold our 37.5% interest in AAE to our partner, Ahaus Alstätter Eisenbahn Holding AG (“AAE Holding”), and recognized a pretax gain of $9.3 million, which we reported as part of our share of affiliates' earnings. The sale price of $114.1 million consisted of a cash payment at closing of $23.0 million and a seller loan of €67.5 million ($91.1 million) at a market interest rate. The loan was paid in full in January 2015.

The following table presents our most significant investments in affiliated companies and our ownership percentage in those companies by segment as of December 31, 2015 (in millions):

	Segment	Investment		Percentage Ownership
Rolls-Royce & Partners Finance (1)	Portfolio Management	$	335.1	50.0	%
Adler Funding LLC	Rail North America	11.7		12.5	%
Other affiliates	Various	1.7		Various
Investments in Affiliated Companies		$	348.5

__________

(1) Combined investment balances of fifteen separate joint ventures (collectively, the "RRPF affiliates").

The following table shows our share of affiliates’ earnings by segment for the years ending December 31 (in millions):

	2015			2014			2013
Rail North America	$	0.5		$	7.9		$	10.3
Rail International	(0.3		)	(0.3		)	21.1
Portfolio Management (1)	45.2			60.2			60.9
Share of affiliates' earnings (pretax)	45.4			67.8			92.3
Income taxes	0.5			(18.3		)	(16.5		)
Share of Affiliates' Earnings	$	45.9		$	49.5		$	75.8

__________

(1) Includes a $19.0 million impairment loss in 2015.

The following table shows our cash investments in and distributions and loan payments from our affiliates by segment for the years ended December 31 (in millions):

	Cash Investments						Cash Distributions (1)
	2015		2014		2013		2015		2014		2013
Rail North America	$	—	$	—	$	—	$	5.1	$	20.0	$	—
Portfolio Management	15.5		15.3		101.3		32.2		34.2		47.0
	$	15.5	$	15.3	$	101.3	$	37.3	$	54.2	$	47.0

__________

(1) Cash distributions exclude proceeds from sales of affiliates of $24.7 million in 2015, $19.4 million in 2014, and $55.6 million in 2013.

Summarized Financial Data of Affiliates

The following table shows the aggregated operating results for the years ended December 31 for the affiliated companies we held at December 31 (in millions):

	2015		2014		2013
Revenues	$	339.3	$	339.0	$	334.5
Gains on sales of assets	37.6		33.7		43.5
Net income	121.4		99.6		108.6

The following table shows aggregated summarized balance sheet data for our affiliated companies as of December 31 (in millions):

	2015		2014
Current assets	$	185.0	$	211.6
Noncurrent assets	3,254.1		3,195.1
Total assets	$	3,439.1	$	3,406.7
Current liabilities	$	285.5	$	378.4
Noncurrent liabilities	2,512.2		2,388.2
Shareholders’ equity	641.4		640.1
Total liabilities and shareholders' equity	$	3,439.1	$	3,406.7

Summarized Financial Data for the RRPF Affiliates

As noted above, our affiliate investments include 50% interests in each of the RRPF affiliates, a collection of fifteen domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. The RRPF affiliates are primarily engaged in two business activities: lease financing of aircraft spare engines to a diverse group of commercial aircraft operators worldwide and lease financing of aircraft spare engines to Rolls-Royce for use in their engine maintenance programs. In aggregate, the RRPF affiliates own 436 aircraft engines at December 31, 2015, of which 224 were on lease to Rolls-Royce. Aircraft engines are generally depreciated over a useful life of 25 years to an estimated residual value. Lease terms vary but typically range from 7 to 10 years. Rolls-Royce manages each of the RRPF affiliates and also performs substantially all required maintenance activities. Our share of affiliates' earnings (after-tax) from the RRPF affiliates was $58.4 million in 2015, $42.2 million in 2014, and $46.5 million in 2013.

We derived the following financial information from the combined financial statements of the RRPF affiliates.

The following table shows condensed income statements of the RRPF affiliates for the years ending December 31 (in millions):

	2015			2014			2013
Lease revenue from third parties	$	191.4		$	176.9		$	147.6
Lease revenue from Rolls-Royce	138.7			124.7			119.7
Depreciation expense	(166.1		)	(140.7		)	(120.2		)
Interest expense	(56.7		)	(59.5		)	(65.8		)
Other expenses	(8.8		)	(11.8		)	(10.2		)
Gains on sales of assets	33.1			22.7			35.2
Income before income taxes	131.6			112.3			106.3
Income tax benefits (provision) (1)	(9.0		)	(17.3		)	0.4
Net income	$	122.6		$	95.0		$	106.7

_________

(1) Represents income taxes directly attributable to the RRPF affiliates in the United Kingdom. Several of the RRPF affiliates are flow through entities and income taxes are incurred at the owner level. Amounts shown for 2015 and 2013 include deferred income tax benefits of approximately $15.4 million and $15.2 million, attributable to statutory rate decreases enacted in the United Kingdom.

The following table shows the condensed balance sheets of the RRPF affiliates as of December 31 (in millions):

	2015		2014
Current assets	$	173.4	$	146.3
Noncurrent assets, including operating assets, net of accumulated depreciation of $993.6 and $862.8 (a)	3,161.4		2,988.1
Total assets	$	3,334.8	$	3,134.4
Current liabilities, excluding debt	$	85.1	$	74.4
Debt obligations	2,391.1		2,295.7
Other liabilities	231.4		219.4
Shareholders’ equity	627.2		544.9
Total liabilities and shareholders' equity	$	3,334.8	$	3,134.4

_________

(a) All operating assets were pledged as collateral for long-term debt obligations.

The following table shows contractual future lease receipts from noncancelable leases of the RRPF affiliates as of December 31, 2015 (in millions):

	Rolls-Royce		Third Parties		Total
2016	$	144.1	$	157.7	$	301.8
2017	122.9		147.5		270.4
2018	119.0		126.9		245.9
2019	114.0		84.5		198.5
2020	93.3		72.4		165.7
Thereafter	239.5		247.2		486.7
	$	832.8	$	836.2	$	1,669.0

The following table shows maturities of debt obligations of the RRPF affiliates as of December 31, 2015 (in millions):

2016	$	187.6
2017	279.6
2018	134.3
2019	238.2
2020	470.7
Thereafter	1,076.7
Total debt principal (1)	$	2,387.1

_________

(1) All debt obligations are nonrecourse to the shareholders.

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Loans

12 Months Ended

Dec. 31, 2015

Loans Receivable, Net [Abstract]

Loans

We had total loans receivable of $8.8 million at December 31, 2015 and $97.3 million at December 31, 2014. No loans were impaired at December 31, 2015 or 2014. In 2015, AAE repaid its outstanding loan in the amount of €68.2 million ($77.2 million), including €67.5 million ($76.4 million) of remaining principal and €0.7 million ($0.8 million) of accrued interest.

The following table shows scheduled loan principal payments due by year at December 31, 2015 (in millions):

2016	$	2.0
2017	2.0
2018	4.2
2019	0.1
2020	0.1
Thereafter	0.4
	$	8.8

The following table shows changes in the allowance for losses at December 31 (in millions):

	2015			2014
Beginning balance	$	5.7		$	5.2
Provision for losses	6.6			0.8
Charges to allowance	(1.9		)	(0.3		)
Recoveries and other, including foreign exchange adjustments	(0.1		)	—
Ending balance	$	10.3		$	5.7

The allowance for losses is comprised of a general allowance for trade receivables and specific allowances for finance leases. As of December 31, 2015, the general allowance for trade receivables was $6.3 million, or 9.1% of rent and other receivables, compared to $4.5 million, or 5.2% of rent and other receivables, at December 31, 2014. At December 31, 2015, specific allowances for finance leases were $4.0 million compared to $1.2 million at December 2014. The specific allowance increase in 2015 was related to a loss reserve recorded in connection with one investment at Portfolio Management.

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Variable Interest Entities

12 Months Ended

Dec. 31, 2015

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Variable Interest Entities

We determined that we are the primary beneficiary of one of our variable interest entities, a structured lease financing of a portfolio of railcars, because we have the power to direct its significant activities. As a result, we consolidate this variable interest entity. The risks associated with it are similar to those of our wholly owned railcar leasing activities.

The following table shows the carrying amounts of assets and liabilities of the consolidated variable interest entity as of December 31 (in millions):

	2015		2014
Operating assets, net of accumulated depreciation (1)	$	83.2	$	88.1
Nonrecourse debt	6.9		15.9

_________

(1) All operating assets are pledged as collateral on the nonrecourse debt.

We determined that we are not the primary beneficiary of our other variable interest entities, which are primarily investments in aircraft spare engine leasing affiliates that were financed through a variety of equity investments and third-party lending arrangements. We are not the primary beneficiary of these variable interest entities because we do not have the power to direct the activities that most significantly impact the entities’ economic performance. Rather, that power was shared by the affiliate partners based on the terms of the relevant joint venture agreements, which require approval of all partners for significant decisions regarding the variable interest entity.

The following table shows the carrying amounts and maximum exposure to loss for our unconsolidated variable interest entities as of December 31 (in millions):

	2015				2014
	Net Carrying Amount		Maximum Exposure to Loss		Net Carrying Amount		Maximum Exposure to Loss
Investments in affiliates	$	161.2	$	161.2	$	143.9	$	143.9
Other investment	0.2		0.2		0.4		0.4
Total	$	161.4	$	161.4	$	144.3	$	144.3

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Debt

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Debt

Commercial Paper and Borrowings Under Bank Credit Facilities ($ in millions)

	December 31
	2015			2014
Balance	$	7.4		$	72.1
Weighted average interest rate	1.22		%	0.56		%

Recourse and Nonrecourse Debt Obligations

The following table shows the outstanding balances of our debt obligations and the applicable interest rates as of December 31 ($ in millions):

	Date of Issue	Final Maturity	Interest Rate		2015		2014
Recourse Fixed Rate Debt
Unsecured	03/03/06	03/01/16	5.80	%	$	200.0	$	200.0
Unsecured	11/19/10	07/15/16	3.50	%	250.0		250.0
Unsecured	09/20/11	07/15/16	3.50	%	100.0		100.0
Unsecured	03/04/14	03/04/17	1.25	%	300.0		300.0
Unsecured	02/06/08	02/15/18	6.00	%	200.0		200.0
Unsecured	03/19/13	07/30/18	2.38	%	250.0		250.0
Unsecured (1)	12/27/10	10/31/18	3.84	%	10.9		15.7
Unsecured (1)	11/29/10	11/30/18	3.70	%	8.1		12.1
Unsecured	01/30/15	12/31/18	1.20	%	54.3		—
Unsecured	11/19/13	03/15/19	2.50	%	300.0		300.0
Unsecured	03/04/14	07/30/19	2.50	%	250.0		250.0
Unsecured	10/31/14	03/30/20	2.60	%	250.0		250.0
Unsecured	02/06/15	03/30/20	2.60	%	100.0		—
Unsecured	05/27/11	06/01/21	4.85	%	250.0		250.0
Unsecured	09/20/11	06/01/21	4.85	%	50.0		50.0
Unsecured	06/11/12	06/15/22	4.75	%	250.0		250.0
Unsecured	03/19/13	03/30/23	3.90	%	250.0		250.0
Unsecured	02/06/15	03/30/25	3.25	%	300.0		—
Unsecured	03/04/14	03/15/44	5.20	%	300.0		300.0
Unsecured	02/06/15	03/30/45	4.50	%	250.0		—
Unsecured	04/14/05	04/15/15	5.70	%	—		100.0
Unsecured (2)	02/05/10	05/15/15	4.75	%	—		250.0
Unsecured	12/22/05	12/22/15	5.75	%	—		70.0
Total recourse fixed rate debt					$	3,923.3	$	3,647.8
Recourse Floating Rate Debt
Unsecured (1)	09/02/11	08/31/16	0.94	%	$	5.2	$	8.0
Unsecured	12/21/12	12/21/17	1.64	%	100.0		100.0
Unsecured	01/22/13	12/21/17	1.64	%	10.0		10.0
Unsecured	08/28/14	08/28/24	1.71	%	100.0		100.0

	Date of Issue	Final Maturity	Interest Rate		2015			2014
Unsecured	09/23/15	09/23/25	1.84	%	60.0			—
Unsecured (3)	12/15/10	10/31/15	1.43	%	—			24.8
Unsecured (2)(3)	12/06/11	08/31/16	1.44	%	—			15.3
Unsecured (2)(3)	03/29/06	09/30/16	2.02	%	—			18.9
Unsecured (2)(3)	06/29/07	09/30/16	2.03	%	—			8.5
Unsecured (2)(3)	12/18/07	10/31/16	1.98	%	—			12.7
Unsecured (2)(3)	08/31/12	12/31/19	2.33	%	—			60.5
Unsecured (2)(3)	06/27/13	12/31/20	1.73	%	—			121.0
Unsecured (2)(3)	10/30/13	12/31/20	1.78	%	—			30.2
Unsecured (2)(3)	05/05/14	12/31/20	1.85	%	—			30.2
Total recourse floating rate debt					$	275.2		$	540.1
Nonrecourse Fixed Rate Debt
Secured (1)	09/30/97	09/20/16	6.69	%	$	6.9		$	15.9
Total nonrecourse fixed rate debt					$	6.9		$	15.9
Total debt principal					$	4,205.4		$	4,203.8
Unamortized debt discount and debt issuance costs					(28.5		)	(26.2		)
Debt adjustment for fair value hedges					1.5			0.6
Total Debt					$	4,178.4		$	4,178.2

__________

(1) Amount shown includes scheduled principal payments prior to the final maturity.

(2) Debt repaid prior to the final maturity.

(3) For floating rate debt repaid during 2015, the interest rate reflected is as of the final payment date.

The following table shows the scheduled principal payments of our debt obligations as of December 31, 2015 (in millions):

2016	$	564.8
2017	412.7
2018	517.9
2019	550.0
2020	350.0
Thereafter	1,810.0
Total debt principal	$	4,205.4

At December 31, 2015, $83.2 million of our operating assets were pledged as collateral for certain of our debt obligations.

Shelf Registration Statement

During the third quarter of 2013, we filed an updated shelf registration statement that enables us to issue debt securities and pass-through certificates. The registration statement is effective for three years and does not limit the amount of debt securities and pass-through certificates we can issue.

Credit Lines and Facilities

In 2013, we entered into a new $575 million 5-year unsecured revolving credit facility in the US. In 2015, we exercised an option to extend the maturity date of our revolving credit facility by one year, to April 2020. At December 31, 2015, the full $575 million was available under the facility.

Annual commitment fees for GATX's credit facilities were $1.0 million for 2015, $1.0 million for 2014, and $1.3 million for 2013.

Restrictive Covenants

Our $575 million revolving credit facility contains various restrictive covenants, including requirements to maintain a fixed charge coverage ratio and an asset coverage test. Our ratio of earnings to fixed charges, as defined in this facility, was 2.9for the period ended December 31, 2015, which is in excess of the minimum covenant ratio of1.2. At December 31,2015, we were in compliance with all covenants and conditions of the facility. Some of our bank term loans have the same financial covenants as the facility.

As of December 31, 2015, the indentures for our public debt also contain various restrictive covenants, including limitation on liens provisions that limit the amount of additional secured indebtedness that we may incur to$1,320.4 million. Additionally, certain exceptions to the covenants permit us to incur an unlimited amount of purchase money and nonrecourse indebtedness. At December 31, 2015, we were in compliance with all covenants and conditions of the indentures.

The loan agreements for our European rail subsidiaries ( "GATX Rail Europe" or "GRE") also contain restrictive covenants, including leverage and cash flow covenants specific to those subsidiaries, restrictions on making loans, and limitations on the ability of those subsidiaries to repay loans or to distribute capital to certain related parties (including GATX, the US parent company). These covenants effectively limit GRE's ability to transfer funds to us. At December 31, 2015, the maximum amount that GRE could transfer to us without violating its covenants was$121.5 million, therefore implying the loan covenants restrict$374.4 millionof subsidiary net assets. At December 31, 2015, GRE was in compliance with all covenants and conditions of these loan agreements.

Another subsidiary’s financing that is guaranteed by us contains various restrictive covenants, including covenants that require us to maintain a defined net worth and a fixed charge coverage ratio. This fixed charge coverage ratio covenant is less restrictive than the covenant in our revolving credit facility.

We do not anticipate any covenant violations nor do we anticipate that any of these covenants will restrict our operations or our ability to obtain additional financing.

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Fair Value Disclosure

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Fair Value Disclosure

Fair Value Disclosure

The following tables show our assets and liabilities that are measured at fair value on a recurring basis (in millions):

Assets	Total December 31 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate derivatives (1)	$	1.8	$	—	$	1.8	$	—
Foreign exchange rate derivatives (1)	10.2		—		10.2		—
Foreign exchange rate derivatives (2)	0.8		—		0.8		—
Available-for-sale equity securities	3.3		3.3		—		—
Liabilities
Interest rate derivatives (1)	1.2		—		1.2		—
Foreign exchange rate derivatives (1)	0.2		—		0.2		—
Foreign exchange rate derivatives (2)	2.4		—		2.4		—

Assets	Total December 31 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate derivatives (1)	$	1.8	$	—	$	1.8	$	—
Foreign exchange rate derivatives (2)	9.7		—		9.7		—
Available-for-sale equity securities	4.4		4.4		—		—
Liabilities
Interest rate derivatives (1)	5.9		—		5.9		—
Foreign exchange rate derivatives (2)	1.6		—		1.6		—

_________

(1) Designated as hedges.

(2) Not designated as hedges.

We base our valuations of available-for-sale equity securities on their quoted prices on an active exchange. We value derivatives using a pricing model with inputs (such as yield curves and foreign currency rates) that are observable in the market or that can be derived principally from observable market data.

In addition, we review long-lived assets, such as operating assets and facilities, for impairment whenever circumstances indicate that the carrying amount of these assets may not be recoverable. We determine the fair value of the respective assets using Level 3 inputs, including estimates of discounted future cash flows (including net proceeds from sale), independent appraisals, and market comparables, as applicable. See "Note 11. Asset Impairments"for further information about our impairment losses. The fair value of assets held at December 31 that were subject to non-recurring Level 3 fair value measurements was $34.0 million and $2.5 million for 2015 and 2014. These amounts are consistent with the fair value of the assets at the time of impairment.

Derivative instruments

Fair Value Hedges

We use interest rate swaps to manage the fixed-to-floating rate mix of our debt obligations by converting the fixed rate debt to floating rate debt. For fair value hedges, we recognize changes in fair value of both the derivative and the hedged item as interest expense. We had eight instruments outstanding with an aggregate notional amount of $550.0 million as of December 31, 2015 that mature from 2017 to 2020 and eight instruments outstanding with an aggregate notional amount of $600.0 million as of December 31, 2014.

Cash Flow Hedges

We use interest rate swaps to convert floating rate debt to fixed rate debt. We use Treasury rate locks to hedge our exposure to interest rate risk on anticipated transactions. We also use currency swaps to hedge our exposure to fluctuations in the exchange rates of the foreign currencies in which we conduct business. We had ten instruments outstanding with an aggregate notional amount of $442.9 million as of December 31, 2015 that mature from 2016 to 2022 and seven instruments outstanding with an aggregate notional amount of $281.5 million as of December 31, 2014. Within the next 12 months, we expect to reclassify $5.8 million ($3.6 million after-tax) of net losses on previously terminated derivatives from accumulated other comprehensive income (loss) to interest expense or operating lease expense, as applicable. We reclassify these amounts when interest and operating lease expense on the related hedged transactions affect earnings.

Non-designated Derivatives

We do not hold derivative financial instruments for purposes other than hedging, although certain of our derivatives are not designated as accounting hedges. We recognize changes in the fair value of these derivatives in other (income) expense immediately.

Some of our derivative instruments contain credit risk provisions that could require us to make immediate payment on net liability positions in the event that we default on certain outstanding debt obligations. The aggregate fair value of our derivative instruments with credit risk related contingent features that are in a liability position as of December 31, 2015 was $1.4 million. We are not required to post any collateral on our derivative instruments and do not expect the credit risk provisions to be triggered.

In the event that a counterparty fails to meet the terms of an interest rate swap agreement or a foreign exchange contract, our exposure is limited to the fair value of the swap, if in our favor. We manage the credit risk of counterparties by transacting with institutions that we consider financially sound and by avoiding concentrations of risk with a single counterparty. We believe that the risk of non-performance by any of our counterparties is remote.

The following table shows the impacts of our derivative instruments on our statement of comprehensive income for the years ended December 31 (in millions):

Derivative Designation	Location of Loss (Gain) Recognized	2015			2014			2013
Fair value hedges (1)	Interest expense	$	(0.8	)	$	4.7		$	4.9
Cash flow hedges	Other comprehensive loss (effective portion)	5.3			5.1			(0.7		)
Cash flow hedges	Interest expense (effective portion reclassified from accumulated other comprehensive loss)	5.6			4.9			5.1
Cash flow hedges	Operating lease expense (effective portion reclassified from accumulated other comprehensive loss)	0.3			3.2			1.5
Cash flow hedges (2)	Other (income) expense (effective portion reclassified from accumulated other comprehensive loss)	(6.9		)	(2.1		)	—
Non-designated (3)	Other (income) expense	(6.1		)	(11.4		)	(0.6		)

_________

(1) The fair value adjustments related to the underlying debt equally offset the amounts recognized in interest expense.

(2) For 2015 and 2014, includes $6.1 million and $2.1 million of gains on foreign currency derivatives which are substantially offset by losses from foreign currency remeasurement adjustments, also recognized in Other (income) expense.

(3) For 2015 and 2014, includes $5.1 million, and $10.4 million of gains on foreign currency derivatives which substantially offset losses from foreign currency remeasurement adjustments on the AAE loan, also recognized in Other (income) expense.

Other Financial Instruments

The carrying amounts of cash and cash equivalents, restricted cash, rent and other receivables, accounts payable, and commercial paper and bank credit facilities approximate fair value due to the short maturity of those instruments. We base the fair values of investment funds, which are accounted for under the cost method, on the best information available, which may include quoted investment fund values. We estimate the fair values of loans and fixed and floating rate debt using discounted cash flow analyses that are based on interest rates currently offered for loans with similar terms to borrowers of similar credit quality. The inputs we use to estimate each of these values are classified in Level 2 of the fair value hierarchy because they are directly or indirectly observable inputs.

The following table shows the carrying amounts and fair values of our other financial instruments as of December 31 (in millions):

	2015		2015		2014		2014
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Investment funds	$	0.6	$	1.2	$	1.5	$	2.4
Loans	8.8		8.7		97.3		97.4
Liabilities
Recourse fixed rate debt	$	3,915.0	$	3,882.6	$	3,639.9	$	3,775.0
Recourse floating rate debt	275.2		264.6		540.0		540.0
Nonrecourse debt	6.9		7.1		15.9		16.6

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Asset Impairments (Notes)

12 Months Ended

Dec. 31, 2015

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Asset Impairments

Asset Impairments

We recorded impairment losses of $33.9 million, $1.3 million, and $5.9 million for certain of our operating assets in 2015, 2014 and 2013. In addition, an impairment loss of $19.0 million was recorded in 2015 for one of our affiliate investments.

During 2015, GATX management made the decision to exit the majority of our marine investments within the Portfolio Management segment, including six chemical parcel tankers (the "Nordic Vessels"), certain inland marine vessels, and our 50% interest in the Cardinal Marine joint venture. As a result, the Nordic Vessels and the inland marine vessels were classified as held for sale and adjusted to the lower of their respective carrying amounts or fair value less costs to sell. Furthermore, the Cardinal Marine joint venture was evaluated to assess whether an other-than-temporary decline in the value of the investment had occurred. Based on our analysis, an aggregate impairment loss of $49.8 million was recognized. These impairments were driven by our decision to exit these investments and resulted primarily from the associated change in our expected use and holding periods for these assets. The impairment losses on the vessels of $30.8 million were included in net (loss) gains on asset dispositions, and the impairment loss on our Cardinal Marine investment of $19.0 million was included in the share of affiliates' earnings in the consolidated statement of comprehensive income. As of December 31, 2015, we have completed the sales of certain of our marine investments, as well as our 50% interest in the Cardinal Marine joint venture.

In addition to the impairments of marine assets noted above, we also recorded impairment losses of $3.1 million for railcars and other operating assets designated for sale or scrapping in 2015. In 2014 and 2013, impairment losses related to certain railcars and other long-lived assets designated for sale or scrapping. For each year, impairment losses were included in net (loss) gains on asset dispositions in the consolidated statement of comprehensive income. Total assets classified as held for sale at December 31, 2015 were $106.0 million, including $103.4 million of marine investments, all of which we expect to sell in 2016.

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Pension and Other Post-Retirement Benefits

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Pension and Other Post-Retirement Benefits

We maintain both funded and unfunded noncontributory defined benefit pension plans covering our domestic employees and the employees of our subsidiaries. We also have a funded noncontributory defined benefit pension plan related to a former business in the United Kingdom that has no active employees. The plans base benefits payable on years of service and/or final average salary. We base our funding policies for the pension plans on actuarially determined cost methods allowable under IRS regulations and statutory requirements in the UK.

In addition to the pension plans, we have other post-retirement plans that provide health care, life insurance, and other benefits for certain retired domestic employees who meet established criteria. Most domestic employees that retire with immediate benefits under our pension plan are eligible for health care and life insurance benefits. The other post-retirement plans are either contributory or noncontributory, depending on various factors.

During 2015, we offered an early retirement program for certain eligible employees, effective in 2016. This program provided enhanced benefits to the employees that elected to participate and provided the option for employees to receive their benefits as a lump sum payment or as an annuity. Employees that elected to participate in this program will choose their payment option in 2016. Special termination benefits of $9.0 million resulting from this program were recognized as a one-time charge and recorded as an expense in 2015.

We use a December 31 measurement date for all of our plans. The following tables show pension obligations, plan assets, and other post-retirement obligations as of December 31 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life
Change in Benefit Obligation
Benefit obligation at beginning of year	$	502.7		$	442.7		$	40.8		$	40.4
Service cost	7.4			5.9			0.2			0.1
Interest cost	19.6			20.7			1.3			1.6
Plan amendments	—			—			(2.5		)	—
Actuarial (gain) loss	(22.6		)	67.0			(3.6		)	2.6
Benefits paid	(36.9		)	(31.2		)	(2.9		)	(3.9		)
Special termination benefits	7.3			—			1.7			—
Effect of foreign exchange rate changes	(2.5		)	(2.4		)	—			—
Benefit obligation at end of year	$	475.0		$	502.7		$	35.0		$	40.8
Change in Fair Value of Plan Assets
Plan assets at beginning of year	456.9			447.8			—			—
Actual return on plan assets	(4.6		)	40.3			—			—
Effect of exchange rate changes	(2.2		)	(2.4		)	—			—
Company contributions	2.9			2.4			2.9			3.9
Benefits paid	(36.9		)	(31.2		)	(2.9		)	(3.9		)
Plan assets at end of year	$	416.1		$	456.9		$	—		$	—
Funded Status at end of year	$	(58.9	)	$	(45.8	)	$	(35.0	)	$	(40.8	)
Amount Recognized
Other Liabilities and Other Assets (net)	$	(58.9	)	$	(45.8	)	$	(35.0	)	$	(40.8	)
Accumulated other comprehensive loss:
Net actuarial loss	163.3			170.9			(0.2		)	3.3
Prior service (credit) cost	(1.1		)	(2.1		)	(2.0		)	0.4
Accumulated other comprehensive loss	162.2			168.8			(2.2		)	3.7
Total recognized	$	103.3		$	123.0		$	(37.2	)	$	(37.1	)
After-tax amount recognized in accumulated other comprehensive loss	$	101.3		$	105.4		$	(1.4	)	$	2.3

The aggregate accumulated benefit obligation for the defined benefit pension plans was $449.4 million at December 31, 2015 and $475.8 million at December 31, 2014.

The following table shows our pension plans that have a projected benefit obligation in excess of plan assets as of December 31 (in millions):

	2015		2014
Projected benefit obligations	$	438.3	$	502.7
Fair value of plan assets	378.6		456.9

The following table shows our pension plans that have an accumulated benefit obligation in excess of plan assets as of December 31 (in millions):

	2015		2014
Accumulated benefit obligations	$	412.6	$	170.6
Fair value of plan assets	378.6		140.5

The following table shows the components of net periodic cost (benefit) for the year ended December 31 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2013 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life			2013 Retiree Health and Life
Service cost	$	7.4		$	5.9		$	6.7		$	0.2		$	0.1		$	0.2
Interest cost	19.6			20.7			18.4			1.3			1.6			1.6
Expected return on plan assets	(25.8		)	(28.4		)	(27.5		)	—			—			—
Special termination benefits	7.3			—			—			1.7			—			—
Amortization of:
Unrecognized prior service credit	(1.0		)	(1.0		)	(1.0		)	(0.1		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	14.8			11.3			14.9			(0.2		)	(0.1		)	—
Net periodic cost	$	22.3		$	8.5		$	11.5		$	2.9		$	1.5		$	1.7

We amortize the unrecognized prior service credit using a straight-line method over the average remaining service period of the employees we expect to receive benefits under the plan. We amortize the unrecognized net actuarial loss (gain), which is subject to certain averaging conventions, over the average remaining service period of active employees.

The following table shows the amounts we expect to recognize as components of net periodic cost in 2016 from amounts recorded in accumulated comprehensive loss (gain) as of December 31, 2015 (in millions):

	2016
	Pension Benefits			Retiree Health and Life
Unrecognized net actuarial loss (gain)	$	10.4		$	(0.1	)
Unrecognized prior service credit	(1.0		)	(0.2		)

We use the following assumptions to measure the benefit obligation, compute the expected long-term return on assets, and measure the periodic cost for our defined benefit pension plans and other post-retirement benefit plans for the years ended December 31:

	2015		2014
Domestic defined benefit pension plans
Benefit Obligation at December 31:
Discount rate — salaried funded and unfunded plans	4.46	%	4.05	%
Discount rate — hourly funded plan	4.51	%	4.10	%
Rate of compensation increases — salaried funded and unfunded plans	2.50	%	2.50	%
Rate of compensation increases — hourly funded plans	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate — salaried funded and unfunded plans	4.05	%	4.80	%
Discount rate — hourly funded plan	4.10	%	4.90	%
Expected return on plan assets — salaried funded plan	6.50	%	7.60	%
Expected return on plan assets — hourly funded plan	6.35	%	6.90	%
Rate of compensation increases — salaried funded and unfunded plans	2.50	%	3.00	%
Rate of compensation increases — hourly funded plan	N/A		N/A
Foreign defined benefit pension plan
Benefit Obligation at December 31:
Discount rate	3.60	%	3.20	%
Rate of pension-in-payment increases	3.00	%	2.90	%
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate	3.20	%	4.40	%
Expected return on plan assets	4.80	%	5.40	%
Rate of pension-in-payment increases	2.90	%	3.40	%
Other post-retirement benefit plans
Benefit Obligation at December 31:
Discount rate - salaried health	3.96	%	3.65	%
Discount rate - hourly health	4.11	%	3.85	%
Discount rate - salaried life insurance	4.40	%	4.00	%
Discount rate - hourly life insurance	4.04	%	3.70	%
Rate of compensation increases	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate - salaried health	3.65	%	4.20	%
Discount rate - hourly health	3.85	%	4.60	%
Discount rate - salaried life insurance	4.00	%	4.75	%
Discount rate - hourly life insurance	3.70	%	4.40	%
Rate of compensation increases	N/A		N/A

We calculate the present value of expected future pension and post-retirement cash flows as of the measurement date using a discount rate. We base the discount rate on yields for high-quality, long-term bonds with durations similar to that of our projected benefit obligation. We base the expected return on our plan assets on current and expected asset allocations, as well as historical and expected returns on various categories of plan assets. We routinely review our historical returns along with current market conditions to ensure our expected return assumption is reasonable and appropriate.

	2015		2014
Assumed Health Care Cost Trend Rates at December 31
Health care cost trend assumed for next year
Medical claims - pre age 65	7.00	%	7.50	%
Medical claims - post age 65	6.00	%	7.50	%
Prescription drugs claims - pre age 65	10.00	%	7.00	%
Prescription drugs claims - post age 65	10.50	%	7.00	%
Rate to which the cost trend is expected to decline (the ultimate trend rate)
Medical claims	4.50	%	5.00	%
Prescription drugs claims	4.50	%	5.00	%
Year that rate reaches the ultimate trend rate
Medical claims	2024		2023
Prescription drugs claims	2024		2023

The health care cost trend, which is based on projected growth rates for medical and prescription drug claims, has a significant effect on our other post-retirement benefit costs and obligations. The following table shows the effects of a one percentage point change in the health care cost trend rate on service and interest costs for the year ended December 31, 2015 and the post-retirement benefit obligation as of December 31, 2015 (in millions) :

	One Percentage Point Increase		One Percentage Point Decrease
Effect on total of service and interest cost	$	0.1	$	(0.1	)
Effect on post-retirement benefit obligation	1.5		(1.3		)

Our investment policies require that asset allocations of domestic and foreign funded pension plans be maintained at certain targets. The following table shows our weighted-average asset allocations of our domestic funded pension plans at December 31, 2015 and 2014, and current target asset allocation for 2016, by asset category:

			Plan Assets at December 31
	Target		2015		2014
Asset Category
Equity securities	52.0	%	50.2	%	51.7	%
Debt securities	44.0	%	44.4	%	43.9	%
Real estate	4.0	%	5.4	%	4.3	%
Cash	—	%	—	%	0.1	%
	100.0	%	100.0	%	100.0	%

The following table shows the weighted-average asset allocations of our foreign funded pension plan at December 31, 2015 and 2014, and current target asset allocation for 2016, by asset category:

			Plan Assets at December 31
	Target		2015		2014
Asset Category
Equity securities	36.8	%	36.8	%	37.7	%
Debt securities	63.2	%	63.2	%	62.3	%
	100.0	%	100.0	%	100.0	%

The following tables set forth the fair value of our pension plan assets as of December 31 (in millions):

	Total December 31 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Short-term investment funds	$	1.6	$	1.6	$	—	$	—
Common stock							—
US equities	11.4		11.4		—		—
International equities	1.2		1.2		—		—
Common stock collective funds	190.4		—		190.4		—
Fixed income collective trust funds	160.4		—		160.4		—
Real estate collective trust funds	20.2		—		20.2		—
Loan fund	30.9		—		30.9		—
Total	$	416.1	$	14.2	$	401.9	$	—

	Total December 31 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Short-term investment funds	$	0.9	$	0.9	$	—	$	—
Common stock							—
US equities	13.3		13.3		—		—
International equities	1.6		1.6		—		—
Common stock collective funds	215.2		—		215.2		—
Fixed income collective trust funds	177.8		—		177.8		—
Real estate collective trust funds	17.9		—		17.9		—
Loan fund	30.2		—		30.2		—
Total	$	456.9	$	15.8	$	441.1	$	—

The following is a description of the valuation techniques and inputs used as of December 31, 2015 and 2014:

Short-term investment funds

We value short-term investment funds based on the closing net asset values quoted by the funds. The net asset values are the unitized fair values of the underlying securities held by the trusts, which are traded in an active market. Short-term investment funds are highly liquid investments in obligations of the US Government or its agencies or instrumentalities, and the related money market instruments. The short-term investment funds have no unfunded commitments, restrictions on redemption frequency, or advance notice periods required for redemption.

Common stock

We value common stock traded in an active market at the last reported sales price on the last business day of the plan year.

Common stock and fixed income collective trust funds

We value common stock and fixed income collective trust funds based on the closing net asset values quoted by the funds. The net asset values are the unitized fair values of the underlying securities held by the trusts, which are traded in an active market. None of the collective trusts have unfunded commitments, restrictions on redemption frequency, or advance notice periods required for redemption. The investment objective of each of the common stock funds is long-term total return through capital appreciation and current income. The fixed income funds are each designed to deliver safety and stability by preserving principal and accumulated earnings.

Real estate collective trust funds

We value real estate collective trust funds based on the net asset values provided by the funds' administrators, which are the unitized fair values of the underlying US commercial real estate investments held by the funds. An independent appraisal determines the fair values of the real estate properties. Redemptions from the real estate funds are available with either 45 or 60 day notice prior to the end of a quarter. A lack of liquidity in the funds may limit or delay redemptions. The investment objective of the real estate funds, which are diversified by location and property type, is long-term return through property appreciation, current income, and timely sales.

Loan fund

The loan fund is a limited liability company (LLC) and is valued using the NAV. The NAV is based on the fair value of the underlying assets owned by the LLC, less its liabilities, multiplied times the ownership interest of the LLC. As of December 31, 2015, the GATX Master Trust held investments in one LLC. Generally, capital may be withdrawn as of the last day of the month upon written notice given on no later than 30 days prior to the withdrawal date. The investment manager may determine in its discretion to allow withdrawals on any such other date. The limited liability company fund seeks to achieve risk-adjusted total returns by buying and selling investments that are anticipated to have a primarily bank loan focus. Investments will be primarily in debt securities of midsize and large capitalizations. The Plan is allocated 100% of the interest that the GATX Corporation Master Trust holds in the LLC. There are no unfunded commitments.

The primary investing objective of the pension plans is to provide benefits to plan participants and their beneficiaries. To achieve this goal, we invest in a diversified portfolio of equities, debt, and real estate investments to maximize return and to keep long-term investment risk at a reasonable level. Equity investments are diversified across US and non-US stocks, growth and value stocks, and small cap and large cap stocks. Debt securities are predominately investments in long-term, investment-grade corporate bonds. Real estate investments include investments in funds that are diversified by location and property type.

On a timely basis, but not less than twice a year, we formally review pension plan investments to ensure we adhere to investment guidelines and our stated investment approach. Our review also evaluates the reasonableness of our investment decisions and risk positions. We compare our investments' performance to indices and peers to determine if investment performance has been acceptable.

In 2016, we expect to contribute approximately $6.4 million to our pension and other post-retirement benefit plans. Additional contributions to the domestic funded pension plans will depend on investment returns on plan assets and actuarial experience.

The following table shows benefit payments, which reflect expected future service, as appropriate, we expect the plan to pay (in millions):

	Funded Plans		Unfunded Plans		Retiree Health and Life
2016	$	42.9	$	2.5	$	3.9
2017	27.9		2.6		3.8
2018	28.1		2.6		3.3
2019	28.2		3.2		2.8
2020	28.6		3.5		2.6
Years 2021-2025	144.5		18.3		11.6
	$	300.2	$	32.7	$	28.0

In addition to our defined benefit plans, we have two 401(k) retirement plans available to substantially all salaried employees and certain other employee groups. We may contribute to the plans as specified by their respective terms and as our board of directors determines. Contributions to our 401(k) retirement plans were $1.9 million for 2015, $1.8 million for 2014, and $1.6 million for 2013.

Multiemployer Plans

Most of the shipboard personnel at ASC participate in various multiemployer benefit plans that provide pension, health care, and post-retirement and other benefits to active and retired employees. Unlike single employer plans, we do not recognize plan assets or obligations for multiemployer plans on our balance sheet. Rather, we recognize our contributions to the plans as marine operating expenses. The amounts we contribute are based on the number of crew hours worked, which depends on the number of vessels deployed and aggregate operating days in a particular year. The risks of participating in these multiemployer plans are different from single employer plans in the following aspects:

• Assets contributed by one employer may be used to provide benefits to employees of other participating employers;

• If a participating employer fails to make its required contributions, any unfunded obligations of the plan may be the responsibility of the remaining participating employers; and

• If an employer chooses to stop participating in a multiemployer plan, the plan may require the withdrawing company to make additional contributions.

The following table shows our contributions to multiemployer benefit plans for the years indicated (in millions):

Multiemployer Plans	EIN and Pension Plan Number	Pension Protection Act Zone Status	GATX Contributions						Collective Bargaining Agreement Expiration Date
			2015		2014		2013
American Maritime Officers Pension Plan (1)	13-1969709-001	Endangered-Yellow	$	1.4	$	1.5	$	1.4	January 15, 2017
Other multiemployer post-retirement plans			6.8		7.0		6.7
Total			$	8.2	$	8.5	$	8.1

__________________

(1)Our contributions represented more than 5% of the total contributions to the plan during each year and no surcharge was imposed for any year. The actuary for the American Maritime Officers Pension Plan certified that the plan is in endangered status (i.e. “yellow zone” as defined by the Pension Protection Act of 2006) for the plan year beginning October 1, 2013, because it has funding or liquidity problems, or both. A rehabilitation plan, as defined by the Employee Retirement Security Act of 1974, was instituted under which certain adjustable benefits were reduced or eliminated, and we are required to contribute at a negotiated rate per day worked by each employee.

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Share-Based Compensation

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

Share-Based Compensation

We provide equity awards to our employees under the GATX Corporation 2012 Incentive Award Plan, including grants of stock appreciation rights, restricted stock units, performance shares and phantom stock awards. As of December 31, 2015, 3.5 million shares were authorized under the 2012 Plan and 1.8 million shares were available for future issuance. We recognize compensation expense for our equity awards in selling, general and administrative expenses over the service period of each award. Share-based compensation expense was $11.6 million for 2015, $14.0 million for 2014, and $13.1 million for 2013, and the related tax benefits were $4.4 million for 2015, $5.3 million for 2014, and $4.9 million for 2013.

Stock Options and Stock Appreciation Rights

Stock options and stock appreciation rights entitle the holder to purchase shares of common stock for periods up to seven years from the grant date. Stock appreciation rights entitle the holder to receive the difference between the market price of our common stock at the time of exercise and the exercise price, either in shares of common stock, cash, or a combination thereof, at our discretion. Stock options entitle the holder to purchase shares of our common stock at a specified exercise price. Since 2006, only stock-settled stock appreciation rights have been awarded. The dividends that accrue on all stock options and stock appreciation rights are paid upon vesting and continue to be paid until the stock options or stock appreciation rights are exercised, canceled, or expire. The exercise price for stock options and stock appreciation rights is equal to the average of the high and low trading prices of our common stock on the date of grant. We recognize compensation expense on a straight-line basis over the vesting period of the award, which is generally three years.

The estimated fair value of a stock appreciation right is the sum of the value we derive using the Black-Scholes option pricing model and the present value of dividends we expect to pay over the expected term of the stock appreciation right. The Black-Scholes valuation incorporates various assumptions, including expected term, expected volatility, and risk free interest rates. We base the expected term on historical exercise patterns and post-vesting terminations, and we base the expected volatility on the historical volatility of our stock price over a period equal to the expected term. We use risk-free interest rates that are based on the implied yield on recently-issued US Treasury zero-coupon bonds with a term comparable to the expected term.

The following table shows the weighted average fair value for our stock appreciation rights and the assumptions we used to estimate fair value:

	2015			2014			2013
Weighted average estimated fair value	$	18.16		$	18.12		$	18.89
Quarterly dividend rate	$	0.38		$	0.33		$	0.30
Expected term of stock appreciation rights, in years	4.7			4.4			4.7
Risk-free interest rate	1.2		%	1.3		%	0.7		%
Dividend yield	2.6		%	2.3		%	2.6		%
Expected stock price volatility	29.2		%	30.3		%	42.4		%
Present value of dividends	$	6.90		$	5.76		$	5.60

The following table shows information about outstanding stock options and stock appreciation rights for the year ended December 31, 2015:

	Number of Stock Options and Stock Appreciation Rights (in thousands)	Weighted Average Exercise Price
Outstanding at beginning of the year	1,490	$	39.65
Granted	342	56.91
Exercised	(231)	25.96
Forfeited/Cancelled	(26)	53.29
Expired	(1)	50.02
Outstanding at end of the year	1,574	45.18
Vested and exercisable at end of the year	976	38.68

The following table shows the aggregate intrinsic value of stock options and stock appreciation rights exercised in 2015, 2014, and 2013, and the weighted average remaining contractual term and aggregate intrinsic value of stock appreciation rights outstanding and vested as of December 31, 2015:

Stock Options and Stock Appreciation Rights	Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (in millions)
Exercised in 2013		$	6.9
Exercised in 2014		11.8
Exercised in 2015		6.2
Outstanding at December 31, 2015 (a)	3.7	6.3
Vested and exercisable at December 31, 2015	2.7	6.3

__________________

(a) As of December 31, 2015, there are no remaining stock options outstanding.

As of December 31, 2013, all stock options were either exercised, forfeited, or expired. Therefore, no cash was received from employees for exercises of stock options during the year ended December 31, 2015 and December 31, 2014. The total cash we received from employees for exercises of stock options during the years ended December 31, 2013 was $1.2 million. As of December 31, 2015, we had $6.0 million of unrecognized compensation expense related to nonvested stock appreciation rights, which we expect to recognize over a weighted average period of 1.7 years.

Restricted Stock Units and Performance Shares

Restricted stock units entitle the recipient to receive a specified number of restricted shares of common stock upon vesting. Restricted stock units do not carry voting rights and are not transferable prior to the expiration of a specified restriction period, which is generally three years, as determined by the Compensation Committee of the Board of Directors ("Compensation Committee"). We accrue dividends on all restricted stock units and pay those dividends when the awards vest. We recognize compensation expense for these awards over the applicable vesting period.

Performance shares are restricted shares that we grant to key employees for achieving certain strategic objectives. The shares convert to common stock at the end of a specified performance period if predetermined performance goals are achieved, as determined by the Compensation Committee. We estimate the number of shares we expect will vest as a result of actual performance against the performance criteria at the time of grant to determine total compensation expense to be recognized. We reevaluate the estimate annually and adjust total compensation expense for any changes to the estimate of the number of shares we expect to vest. We recognize compensation expense for these awards over the applicable vesting period, which is generally three years. The performance shares granted in 2014 include an option to settle shares earned in cash upon vesting.

We value our restricted stock units and performance share awards using the average of the high and low values of our common stock on the grant date of the awards. As of December 31, 2015, there was $6.3 million of unrecognized compensation expense related to these awards, which we expect to be recognized over a weighted average period of 2.1 years.

The following table shows information about restricted stock units and performance shares for the year ended December 31, 2015:

	Number of Share Units Outstanding		Weighted Average Grant-Date Fair Value
Restricted Stock Units:
Nonvested at beginning of the year	177,210		$	48.90
Granted	68,710		56.73
Vested	(63,748	)	44.92
Forfeited	(10,232	)	54.33
Nonvested at end of the year	171,940		53.18
Performance Shares:
Nonvested at beginning of the year	175,069		$	48.95
Granted	61,740		55.54
Net (decrease) due to estimated performance	(22,578	)	54.39
Vested	(92,991	)	45.01
Nonvested at end of the year	121,240		54.32

The total fair value of restricted stock units and performance shares that vested during the year was $7.2 million in 2015, $6.6 million in 2014, and $7.5 million in 2013.

Phantom Stock Awards

We grant phantom stock awards to non-employee directors as a component of their compensation for service on our board of directors. In accordance with the terms of the phantom stock awards, each director is credited with a quantity of units that equate to, but are not, common shares. Phantom stock awards are dividend participating, and all dividends are reinvested in additional phantom shares at the average of the high and low trading prices of our stock on the dividend payment date. At the expiration of each director’s service on the board of directors, or in accordance with his or her deferral election, whole units of phantom stock will be settled with shares of common stock and fractional units will be paid in cash. In 2015, we granted 23,431 units of phantom stock and there were 166,021 units outstanding as of December 31, 2015.

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Income Taxes

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Income Taxes

Deferred income taxes are the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. We have not recognized deferred US income taxes on the undistributed earnings of foreign subsidiaries and affiliates that we intend to permanently reinvest in foreign operations. The cumulative amount of such earnings was $847.7 million at December 31, 2015. The ultimate tax cost of repatriating these earnings depends on tax laws in effect and other circumstances at the time of distribution.

The following table shows the significant components of our deferred tax liabilities and assets as of December 31 (in millions):

	2015			2014
Deferred Tax Liabilities
Book/tax basis difference due to depreciation	$	1,058.1		$	963.8
Investments in affiliated companies	72.9			99.7
Lease accounting	7.3			10.5
Other	—			0.1
Total deferred tax liabilities	1,138.3			1,074.1
Deferred Tax Assets
Federal net operating loss	13.2			41.8
Alternative minimum tax credit	14.8			9.2
Foreign tax credit	5.8			3.6
Valuation allowance on foreign tax credit	(5.8		)	(3.6		)
State net operating loss	27.7			28.7
Valuation allowance on state net operating loss	(12.6		)	(11.3		)
Foreign net operating loss	3.6			5.8
Valuation allowance on foreign net operating loss	(0.3		)	(0.2		)
Accruals not currently deductible for tax purposes	22.2			18.7
Allowance for losses	3.2			1.7
Pension and post-retirement benefits	35.8			32.6
Other	12.4			9.8
Total deferred tax assets	120.0			136.8
Net deferred tax liabilities	$	1,018.3		$	937.3

At December 31, 2015, we have a US federal tax net operating loss carryforward of $37.7 million that will start expiring in 2033. We also have an alternative minimum tax credit of $14.8 million that has an unlimited carryforward period.

At December 31, 2015, we have foreign tax credits of $5.8 million that are scheduled to expire beginning in 2016. We have recorded a $5.8 million valuation allowance related to these credits, as we believe it is more likely than not that we will be unable to utilize them. We also have state net operating losses of $27.7 million, net of federal benefits that are scheduled to expire at various times beginning in 2016. We have recorded a $12.6 million valuation allowance related to state net operating losses, as we believe it is more likely than not that we will be unable to use all of these losses. Additionally, we have foreign net operating losses, net of valuation allowances, of $3.3 million which have unlimited carryforward periods. Our use of future tax credits and net operating losses depends on a number of variables, including the amount of taxable income, foreign source income attributes, and state apportionment factors.

The following table shows a reconciliation of the beginning and ending amount of our gross liability for unrecognized tax benefits (in millions)

	2015		2014
Beginning balance	$	5.6	$	5.7
Reductions due to settlement of tax audit issues	—		(0.4		)
Additions to tax positions for prior years	0.1		0.3
Ending balance	$	5.7	$	5.6

At December 31, 2015, our gross liability for unrecognized tax benefits was $5.7 million, of which $3.8 million, if recognized, would favorably impact income tax expense. During the year ended December 31, 2015, we added an additional $0.1 million gross state tax liability. During the year ended December 31, 2014, we settled a tax audit recognizing a tax benefit of $0.4 million. Additionally, in 2014, we added a gross state tax liability of $0.3 million (net tax expense impact of $0.2 million). We recognize interest and penalties related to unrecognized tax benefits as income tax expense. We have not accrued any amounts for penalties. To the extent interest is not assessed or is otherwise reduced with respect to uncertain tax positions, we will record any required adjustment as a reduction of income tax expense.

We file one consolidated federal income tax return with our domestic subsidiaries in the US jurisdiction, as well as tax returns in various state and foreign jurisdictions. As of December 31, 2015, all audits or statute of limitations with respect to our federal tax returns for years prior to 2012 have been closed or expired. However, GATX and our subsidiaries are undergoing audits in various state jurisdictions.

The following table shows the components of income before income taxes, excluding affiliates, for the years ending December 31 (in millions):

	2015		2014		2013
Domestic	$	174.7	$	137.9	$	66.0
Foreign	95.6		93.3		93.0
	$	270.3	$	231.2	$	159.0

The following table shows income taxes, excluding domestic and foreign joint ventures, for the years ending December 31 (in millions):

	2015			2014		2013
Current
Domestic:
Federal	$	5.6		$	0.7	$	1.4
State and local	(0.2		)	0.6		—
	5.4			1.3		1.4
Foreign	15.3			13.0		10.5
	20.7			14.3		11.9
Deferred
Domestic:
Federal	44.7			45.0		36.6
State and local	33.7			5.6		5.3
	78.4			50.6		41.9
Foreign	11.8			10.8		11.7
	90.2			61.4		53.6
Income taxes	$	110.9		$	75.7	$	65.5

The following table shows the differences between our effective income tax rate and the federal statutory income tax rate for the years ending December 31 (in millions):

	2015			2014			2013
Income taxes at federal statutory rate	$	94.6		$	80.9		$	55.6
Adjust for effect of:
GATX income taxes on sale of AAE	—			—			23.2
Foreign tax credits	—			—			(3.9		)
Foreign earnings taxed at lower rates	(6.2		)	(8.5		)	(10.3		)
Tax effect of foreign dividends	0.9			—			—
Corporate owned life insurance	(0.9		)	(0.6		)	(0.5		)
State income taxes	7.6			4.1			1.5
State deferred tax rate change impact	14.1			—			—
Other	0.8			(0.2		)	(0.1		)
Income taxes	$	110.9		$	75.7		$	65.5
Effective income tax rate	41.0		%	32.7		%	41.2		%

In 2015, our effective tax rate was 41.0% compared to 32.7% in 2014 and 41.2% in 2013. The current year effective tax rate reflects incremental deferred state income taxes of $14.1 million associated with a change in our consolidated effective state tax rate. Specifically, the sale of our marine assets in our Portfolio Management segment will have a negative impact on our allocation factors that will increase our overall effective state income tax rates in future years. Additionally, the rate in 2015 reflects a higher contribution from domestic source income, which is taxed at a higher rate, as well as the impact of an increase in the statutory tax rate in Alberta, Canada. In 2013, we recognized US and state income taxes of $23.2 million on the sale of our investment in AAE. Additionally, we realized foreign tax credit carry forwards of $3.9 million.

The adjustment for foreign earnings in each year reflects the impact of lower tax rates on income earned at our foreign subsidiaries. State income taxes are recognized on domestic pretax income or loss. The amount of our domestic income subject to state taxes relative to our total worldwide income impacts the effect state income tax has on our overall income tax rate.

Separately, our affiliates incurred a tax benefit of $0.5 million in 2015, and income taxes of $18.3 million in 2014, and $16.5 million in 2013. The 2015 and 2013 amounts were favorably impacted by tax benefits of $7.7 million and $7.6 million respectively, as a result of income tax rate reductions enacted in the United Kingdom.

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Concentrations

12 Months Ended

Dec. 31, 2015

Risks and Uncertainties [Abstract]

Concentrations

Concentration of Revenues

We derived revenue from a wide range of industries and companies. In 2015, we generated approximately 30% of our total revenues from customers in the petroleum industry, 18% from the chemical industry, 15% from the transportation industry, 9% from the mining, minerals and aggregates industry, and 7% from the food/agriculture industries. Our foreign identifiable revenues were primarily derived in Germany, Canada, Poland, Mexico, and Austria.

Concentration of Credit Risk

We did not have revenue concentrations greater than 10% from any particular customer for the years ended December 31, 2015, 2014, and 2013. Under our lease agreements with customers, we typically retain legal ownership of the assets unless such assets have been financed by sale-leasebacks. We perform a credit evaluation prior to approval of a lease contract. Subsequently, we monitor the creditworthiness of the customer and the value of the collateral on an ongoing basis. We maintain an allowance for losses to provide for credit losses inherent in our reservable assets portfolio.

Concentration of Labor Force

As of December 31, 2015, collective bargaining agreements covered approximately 42% of our employees, of which agreements covering 22% of employees will expire within the next year. The hourly employees at our US service centers are represented by the United Steelworkers. Employees at three of Rail North America's Canadian service centers are represented by Unifor, the union formerly known as the Communication, Energy and Paperworkers Union of Canada, and Employee Shop Committee of Riviere-des-Prairies. The unlicensed shipboard personnel on twelve of the ASC vessels in operation during 2015 are represented by the Seafarers International Union. Licensed personnel on ASC’s vessels, other than captains, are represented by the American Maritime Officers. Certain employees of GATX Rail Europe are represented by one union in Germany and three unions in Poland.

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Commercial Commitments

12 Months Ended

Dec. 31, 2014

Guarantees [Abstract]

Commercial Commitments

We have entered into various commercial commitments, such as guarantees and standby letters of credit, related to certain transactions. These commercial commitments require us to fulfill specific obligations in the event of third-party demands. Similar to our balance sheet investments, these commitments expose us to credit, market, and equipment risk. Accordingly, we evaluate these commitments and other contingent obligations using techniques similar to those we use to evaluate funded transactions.

The following table shows our commercial commitments as of December 31 (in millions):

	2015		2014
Lease payment guarantees	$	22.1	$	28.5
Standby letters of credit and performance bonds	8.9		9.1
Total commercial commitments (1)	$	31.0	$	37.6

__________________

(1) The carrying value of liabilities on the balance sheet for commercial commitments was $4.1 million at December 31, 2015 and $5.1 million at December 31, 2014. The expirations of these commitments range from 2017 to 2023. We are not aware of any event that would require us to satisfy any of our commitments.

Lease payment guarantees are commitments to financial institutions to make lease payments for a third party in the event they default. We reduce any liability that may result from these guarantees by the value of the underlying asset or group of assets.

We are also parties to standby letters of credit and performance bonds, which primarily relate to contractual obligations and general liability insurance coverages. No material claims have been made against these obligations, and no material losses are anticipated.

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Earnings Per Share

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Earnings Per Share

Earnings per Share

We compute basic earnings per share by dividing net income available to our common shareholders by the weighted average number of shares of our common stock outstanding. We appropriately weighted shares issued or reacquired during the year for the portion of the year that they were outstanding. Our diluted earnings per share reflect the impacts of our potentially dilutive securities, which include our equity compensation awards.

The following table shows the computation of our basic and diluted net income per common share for the years ending December 31 (in millions, except per share amounts):

	2015		2014		2013
Numerator:
Net income	$	205.3	$	205.0	$	169.3
Denominator:
Weighted average shares outstanding - basic	43.1		45.0		46.4
Effect of dilutive securities:
Equity compensation plans	0.7		0.8		0.7
Weighted average shares outstanding - diluted	43.8		45.8		47.1
Basic earnings per share	$	4.76	$	4.55	$	3.64
Diluted earnings per share	$	4.69	$	4.48	$	3.59

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Goodwill

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Our goodwill, all of which pertains to Rail North America and Rail International, was $79.7 million as of December 31, 2015 and $86.1 million as of December 31, 2014. In the fourth quarter of 2015, we performed a review for impairment of goodwill, and concluded that goodwill was not impaired. For 2015 and 2014, changes in the carrying amount of our goodwill resulted from changes in foreign currency exchange rates.

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Allowance for Losses

12 Months Ended

Dec. 31, 2015

Receivables [Abstract]

Allowance for Losses

We had total loans receivable of $8.8 million at December 31, 2015 and $97.3 million at December 31, 2014. No loans were impaired at December 31, 2015 or 2014. In 2015, AAE repaid its outstanding loan in the amount of €68.2 million ($77.2 million), including €67.5 million ($76.4 million) of remaining principal and €0.7 million ($0.8 million) of accrued interest.

The following table shows scheduled loan principal payments due by year at December 31, 2015 (in millions):

2016	$	2.0
2017	2.0
2018	4.2
2019	0.1
2020	0.1
Thereafter	0.4
	$	8.8

The following table shows changes in the allowance for losses at December 31 (in millions):

	2015			2014
Beginning balance	$	5.7		$	5.2
Provision for losses	6.6			0.8
Charges to allowance	(1.9		)	(0.3		)
Recoveries and other, including foreign exchange adjustments	(0.1		)	—
Ending balance	$	10.3		$	5.7

The allowance for losses is comprised of a general allowance for trade receivables and specific allowances for finance leases. As of December 31, 2015, the general allowance for trade receivables was $6.3 million, or 9.1% of rent and other receivables, compared to $4.5 million, or 5.2% of rent and other receivables, at December 31, 2014. At December 31, 2015, specific allowances for finance leases were $4.0 million compared to $1.2 million at December 2014. The specific allowance increase in 2015 was related to a loss reserve recorded in connection with one investment at Portfolio Management.

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Other Assets and Other Liabilities

12 Months Ended

Dec. 31, 2015

Other Assets and Other Liabilities [Abstract]

Other Assets and Other Liabilities

The following table shows the components of other assets reported on our balance sheets as of December 31 (in millions):

	2015		2014
Inventory	$	55.2	$	52.0
Office furniture, fixtures and other equipment, net of accumulated depreciation	31.8		34.1
Derivatives	12.7		11.5
Deferred financing costs	3.4		4.0
Assets held for sale	106.0		7.0
Other investments	4.2		6.0
Prepaid items	14.3		12.4
Prepaid pension	0.7		—
Other	84.1		84.4
	$	312.4	$	211.4

Assets held for sale increased at December 31, 2015 as a result of management's decision to exit the majority of our marine investments within the Portfolio Management segment. For additional information, see "Note 11. Asset Impairments."

The following table shows the components of other liabilities reported on our balance sheets as of December 31 (in millions):

	2015		2014
Accrued operating lease expense	$	19.3	$	43.4
Accrued pension and other post-retirement benefits	94.6		86.6
Deferred gains on sale-leasebacks	44.8		49.0
Unrecognized tax benefits	3.8		3.6
Environmental accruals	13.2		13.8
Deferred income	7.7		5.6
Derivatives	3.7		7.5
Other	33.5		36.6
	$	220.6	$	246.1

Accrued operating lease expense decreased at December 31, 2015 as a result of the purchase of railcars previously on operating leases during the year.

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Shareholders' Equity

12 Months Ended

Dec. 31, 2015

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders’ Equity

In 2015, we purchased 2.4 million shares of common stock for $125.4 million, which completed our $250 million repurchase program authorized in 2014. In 2014, we purchased 1.9 million shares of common stock for $124.6 million. In 2013, we purchased 1.4 million shares of common stock for $68.6 million, which completed our $200 million repurchase authorization approved in 2008. Subsequent to December 31, 2015, our board of directors authorized a new $300 million stock repurchase program. The timing of share repurchases will be dependent on market conditions and other factors.

In accordance with our certificate of incorporation, 120 million shares of common stock are authorized, at a par value of $0.625 per share. As of December 31, 2015, 66.8 million shares were issued and 42.0 million shares were outstanding.

The following shares of common stock were reserved as of December 31, 2015 (in millions):

GATX Corporation 2004 Equity Incentive Compensation Plan	2.3
GATX Corporation 2012 Incentive Award Plan	3.5
	5.8

Our certificate of incorporation also authorizes five million shares of preferred stock at a par value of $1.00 per share. As of December 31, 2015 and December 31, 2014, we have no outstanding shares of preferred stock. In 2013, we either converted or redeemed all 15,567 outstanding shares of our $2.50 cumulative convertible preferred stock.

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Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

The following table shows the change in components for accumulated other comprehensive loss (in millions):

	Foreign Currency Translation Gain (Loss)			Unrealized Gain (Loss) on Securities			Unrealized Loss on Derivative Instruments			Post-Retirement Benefit Plans			Total
Balance at December 31, 2012	$	31.4		$	(0.4	)	$	(44.5	)	$	(131.1	)	$	(144.6	)
Change in component	25.8			1.4			22.3			71.0			120.5
Reclassification adjustments into earnings	—			—			6.6			13.8			20.4
Income tax effect	—			(0.6		)	(6.5		)	(31.9		)	(39.0		)
Balance at December 31, 2013	57.2			0.4			(22.1		)	(78.2		)	(42.7		)
Change in component	(79.1		)	(0.2		)	0.3			(57.3		)	(136.3		)
Reclassification adjustments into earnings	—			—			6.0			10.1			16.1
Income tax effect	—			0.1			(3.3		)	17.7			14.5
Balance at December 31, 2014	(21.9		)	0.3			(19.1		)	(107.7		)	(148.4		)
Change in component	(55.8		)	(1.0		)	1.6			(0.9		)	(56.1		)
Reclassification adjustments into earnings	—			—			(1.0		)	13.5			12.5
Income tax effect	—			0.4			(2.4		)	(4.8		)	(6.8		)
Balance at December 31, 2015	$	(77.7	)	$	(0.3	)	$	(20.9	)	$	(99.9	)	$	(198.8	)

________

See "Note 10. Fair Value Disclosure" and "Note 12. Pension and Other Post-Retirement Benefits" for impacts of the reclassification adjustments on the statement of comprehensive income.

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Foreign Operations

12 Months Ended

Dec. 31, 2015

Concentration Risks, Types, No Concentration Percentage [Abstract]

Foreign Operations

For the years ended December 31, 2015, 2014, and 2013, we did not derive revenues in excess of 10% of our consolidated revenues from any one foreign country. Additionally, at December 31, 2015 and 2014, we did not have more than 10% of our identifiable assets in any one foreign country.

The following table shows our domestic and foreign revenues and identifiable assets for the years ended or as of December 31 (in millions):

	2015		2014		2013
Revenues
Foreign	$	329.4	$	346.2	$	332.1
United States	1,120.5		1,104.8		988.9
	$	1,449.9	$	1,451.0	$	1,321.0
Identifiable Assets
Foreign	$	1,992.3	$	2,133.3	$	2,199.2
United States	4,901.9		4,786.6		4,336.3
	$	6,894.2	$	6,919.9	$	6,535.5

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Legal Proceedings and Other Contingencies

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Legal Proceedings and Other Contingencies

OTE 24. Legal Proceedings and Other Contingencies

Various legal actions, claims, assessments and other contingencies arising in the ordinary course of business are pending against GATX and certain of our subsidiaries. These matters are subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved or settled adversely.

Viareggio Derailment

In June 2009, a train consisting of fourteen liquefied petroleum gas (“LPG”) tank cars owned by GATX Rail Austria GmbH (an indirect subsidiary of the Company, "GATX Rail Austria") and its subsidiaries derailed while passing through the City of Viareggio, in the province of Lucca, Italy. Five tank cars overturned and one of the overturned cars was punctured by a peg or obstacle along the side of the track, resulting in a release of LPG, which subsequently ignited. Thirty-two people died and others were injured in the fire, which also resulted in property damage. The LPG tank cars were leased to FS Logistica S.p.A., a subsidiary of the Italian state-owned railway, Ferrovie dello Stato S.p.A (the “Italian Railway”).

On December 14, 2012, the Public Prosecutors of Lucca ("Public Prosecutors") formally charged GATX Rail Austria and two of its subsidiaries (collectively, "GRA"), as well as ten maintenance and supervisory employees (the "Employees"), with various negligence-based crimes related to the accident, all of which are punishable under Italian law by incarceration, damages, and fines. Similar charges were brought against four Italian Railway companies and eighteen of their employees, among others. The Public Prosecutors assert that the axle on a tank car broke, causing the derailment and resulting in a tank rupture and release of LPG, after the car hit an obstacle placed on the side of the track by the Italian Railway. The Public Prosecutors further allege that a crack in the axle was detectable at the time of final inspection but was overlooked by the Employees at the Jungenthal Waggon GmbH workshop (a subsidiary of GATX Rail Austria). The trial in the Court of Lucca (the “Lucca Trial”) commenced on November 13, 2013.

With respect to civil claims, GRA’s insurers continue to work cooperatively with the insurer for the Italian Railway to adjust and settle personal injury and property damage claims. These joint settlement efforts have so far settled most of the significant civil claims related to the accident; however, approximately 80 civil claimants did not settle and are currently parties to the Lucca Trial. The Court of Lucca will determine both the civil and criminal liability of the defendants in the one proceeding. GRA expects that its insurers will cover any civil damages if awarded to the claimants in the Lucca trial. The Public Prosecutors and civil claimants have finished presenting their cases in the Lucca Trial. GRA, the Italian Railway, and the other defendants in the Lucca Trial began presenting the defense of their cases on September 16, 2015, which presentations are currently underway.

Since May 2012, one of the excess insurers providing coverage, Liberty Mutual Insurance Europe Limited (“Liberty”), settled civil claims but refused to reimburse GRA for its ongoing legal defense fees and costs, taking a position contrary to our other insurers in the prior underlying layers that had provided coverage for such expenses. As of December 31, 2015, GRA had incurred approximately $12.2 million in unreimbursed defense fees and costs, and GRA continues to incur costs in connection with the Lucca Trial. Consequently, in October 2013, GRA filed an arbitration proceeding against Liberty seeking to recoup its unreimbursed defense fees and costs (the “Liberty Arbitration”), which was heard in November 2015. GRA received a partial arbitration award in its favor and anticipates reimbursement of a portion its defense costs in relation to the Lucca Trial. GRA is currently negotiating issues of reimbursement for outstanding defense costs with the insurers in the current coverage layer, which also includes a 25% share held by Liberty.

While GRA believes that it and its Employees acted diligently and properly, we cannot predict the outcome of the negotiations with our insurers, the Lucca Trial, or what other legal proceedings or claims, if any, may be initiated against GRA or its personnel, and, therefore, cannot reasonably estimate the possible amount or range of loss that may ultimately be incurred in connection with this accident.

Other Litigation

GATX and its subsidiaries have been named as defendants in various other legal actions and claims, governmental proceedings, and private civil suits arising in the ordinary course of business, including environmental matters, workers’ compensation claims, and other personal injury claims. Some of these proceedings include claims for punitive as well as compensatory damages.

Several of our subsidiaries have also been named as defendants or co-defendants in cases alleging injury caused by exposure to asbestos. The plaintiffs seek an unspecified amount of damages based on common law, statutory, or premises liability or, in the case of ASC, the Jones Act, which provides limited remedies to certain maritime employees. As of January 31, 2016, there were 79 asbestos-related cases pending against GATX and its subsidiaries. Of the total number of pending cases, 63 are Jones Act claims, most of which were filed against ASC before the year 2000. During 2015, 5 new cases were filed, and 26 cases were dismissed without payment or otherwise settled for an immaterial amount. In addition, demand has been made against GATX for asbestos-related claims under limited indemnities given in connection with the sale of certain of our former subsidiaries. It is possible that the number of these cases or claims for indemnity could begin to grow and that the cost of these cases, including costs to defend, could correspondingly increase in the future.

Litigation Accruals

We have recorded accruals totaling $1.9 million at December 31, 2015 for losses related to those litigation matters that we believe to be probable and for which an amount of loss can be reasonably estimated. However, we cannot determine a reasonable estimate of the maximum possible loss or range of loss for these matters given that they are at various stages of the litigation process and each case is subject to the inherent uncertainties of litigation (such as the strength of our legal defenses and the availability of insurance recovery). Although the maximum amount of liability that may ultimately result from any of these matters cannot be predicted with absolute certainty, management expects that none of the matters for which we have recorded an accrual, when ultimately resolved, will have a material adverse effect on our consolidated financial position or liquidity. It is possible, however, that the ultimate resolution of one or more of these matters could have a material adverse effect on our results of operations in a particular quarter or year if such resolution results in liability that materially exceeds the accrued amount.

In addition, we have other litigation matters pending for which we have not recorded any accruals because our potential liability for those matters is not probable or cannot be reasonably estimated based on currently available information. For those matters where we have not recorded an accrual but a loss is reasonably possible, we cannot determine a reasonable estimate of the maximum possible loss or range of loss for these matters given that they are at various stages of the litigation process and each case is subject to the inherent uncertainties of litigation (such as the strength of our legal defenses and the availability of insurance recovery). Although the maximum amount of liability that may ultimately result from any of these matters cannot be predicted with absolute certainty, management expects that none of the matters for which we have not recorded an accrual, when ultimately resolved, will have a material adverse effect on our consolidated financial position or liquidity. It is possible, however, that the ultimate resolution of one or more of these matters could have a material adverse effect on our results of operations in a particular quarter or year if such resolution results in a significant liability for GATX.

Environmental

Our operations are subject to extensive federal, state, and local environmental regulations. Our operating procedures include practices to protect the environment from the risks inherent in full service railcar leasing, which involves maintaining railcars used by customers to transport chemicals and other hazardous materials. Under some environmental laws in the US and certain other countries, the owner of a leased railcar may be liable for environmental damage and cleanup or other costs in the event of a spill or discharge of material from a railcar without regard to the owner's fault. While our standard master railcar lease agreement requires the lessee to indemnify us against environmental claims and to carry liability insurance coverage, such indemnities and insurance may not fully protect us against claims for environmental damage. Additionally, some of our real estate holdings, including previously owned properties, are or have been used for industrial or transportation-related purposes or leased to commercial or industrial companies whose activities might have resulted in discharges on the property. As a result, we are subject to environmental cleanup and enforcement actions. In particular, the federal Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), also known as the Superfund law, as well as similar state laws, impose joint and several liability for cleanup and enforcement costs on current and former owners and operators of a site without regard to fault or the legality of the original conduct. If there are other potentially responsible parties (“PRPs”), we generally contribute to the cleanup of these sites through cost-sharing agreements with terms that vary from site to site. Costs are typically allocated based on the relative volumetric contribution of material, the period of time the site was owned or operated, and/or the portion of the site owned or operated by each PRP.

At the time a potential environmental issue is identified, initial accruals for environmental liability are established when such liability is determined to be probable and a reasonable estimate of the associated costs can be made. Costs are estimated based on the type and level of investigation and/or remediation activities that our internal environmental staff (and where appropriate, independent consultants) have advised to be necessary to comply with applicable laws and regulations. Activities include surveys and environmental studies of potentially contaminated sites as well as costs for remediation and restoration of sites determined to be contaminated. In addition, we have provided indemnities for potential environmental liabilities to buyers of divested companies. In these instances, accruals are based on the scope and duration of the respective indemnities together with the extent of known contamination. Estimates are periodically reviewed and adjusted as required to reflect additional information about facility or site characteristics or changes in regulatory requirements. We conduct a quarterly environmental contingency analysis, which considers a combination of factors including independent consulting reports, site visits, legal reviews, analysis of the likelihood of participation in and the ability of other PRPs to pay for cleanup, and historical trend analyses.

We are involved in administrative and judicial proceedings and other voluntary and mandatory cleanup efforts at 18 sites, including Superfund sites, for which we are contributing to the cost of performing the study or cleanup, or both, of alleged environmental contamination. As of December 31, 2015, we have recorded accruals of $13.2 million for remediation and restoration costs that we believe to be probable and for which the amount of loss can be reasonably estimated. These amounts are included in other liabilities on our balance sheet. Our environmental liabilities are not discounted.

We did not materially change our methodology for identifying and calculating environmental liabilities in the last three years. Currently, no known trends, demands, commitments, events or uncertainties exist that are reasonably likely to occur and materially affect the methodology or assumptions described above.

The recorded accruals represent our best estimate of all costs for remediation and restoration of affected sites, without reduction for anticipated recoveries from third parties, and include both asserted and unasserted claims. However, we are unable to provide a reasonable estimate of the maximum potential loss associated with these sites because cleanup costs cannot be predicted with certainty. Various factors beyond our control can impact the amount of loss GATX will ultimately incur with respect to these sites, including the extent of corrective actions that may be required; evolving environmental laws and regulations; advances in environmental technology, the extent of other parties' participation in cleanup efforts; developments in periodic environmental analyses related to sites determined to be contaminated, and developments in environmental surveys and studies of potentially contaminated sites. As a result, future charges associated with these sites could have a significant effect on results of operations in a particular quarter or year if the costs materially exceed the accrued amount as individual site studies and remediation and restoration efforts proceed. However, management believes it is unlikely that the ultimate cost to GATX for any of these sites, either individually or in the aggregate, will have a material adverse effect on our consolidated financial position or liquidity.

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Financial Data of Business Segments

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Financial Data of Business Segments

Financial Data of Business Segments

The financial data presented below depicts the profitability, financial position, and capital expenditures of each of our business segments.

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail market. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”), and Portfolio Management.

Rail North America is comprised of our wholly owned operations in the United States, Canada, and Mexico, as well as an affiliate investment. Rail North America primarily provides railcars pursuant to full-service leases under which it maintains the railcars, pays ad valorem taxes and insurance, and provides other ancillary services.

Rail International is comprised of our wholly owned European operations ("GATX Rail Europe" or "GRE") and a wholly owned railcar leasing business in India ("Rail India"), as well as one development stage affiliate in China. GRE leases railcars to customers throughout Europe pursuant to full-service leases under which it maintains the railcars and provides value-adding services according to customer requirements.

ASC operates the largest fleet of US-flagged vessels on the Great Lakes, providing waterborne transportation of dry bulk commodities such as iron ore, coal, limestone aggregates, and metallurgical limestone.

Portfolio Management generates leasing, marine operating, asset remarketing and management fee income through a collection of diversified wholly owned assets and joint venture investments.

Segment profit is an internal performance measure used by the Chief Executive Officer to assess the performance of each segment in a given period. Segment profit includes all revenues, pretax earnings from affiliates, and net gains on asset dispositions that are attributable to the segments, as well as expenses that management believes are directly associated with the financing, maintenance, and operation of the revenue earning assets. Segment profit excludes selling, general and administrative expenses, income taxes, and certain other amounts not allocated to the segments. These amounts are included in Other.

We allocate debt balances and related interest expense to each segment based upon a predetermined fixed recourse leverage level expressed as a ratio of recourse debt (including off-balance sheet debt) to equity. The leverage levels are 5:1 for Rail North America, 2:1 for Rail International, 1.5:1 for ASC, and 3:1 for Portfolio Management. We believe that by using this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

The following tables show certain segment data for the years ended December 31, 2015, 2014, and 2013 (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2015 Profitability
Revenues
Lease revenue	$	930.9		$	172.9		$	4.1		$	22.2		$	—		$	1,130.1
Marine operating revenue	—			—			166.1			68.9			—			235.0
Other revenue	75.9			7.5			—			1.4			—			84.8
Total Revenues	1,006.8			180.4			170.2			92.5			—			1,449.9
Expenses
Maintenance expense	264.2			39.6			22.3			—			—			326.1
Marine operating expense	—			—			107.2			48.7			—			155.9
Depreciation expense	215.1			43.7			14.3			17.4			—			290.5
Operating lease expense	82.2			—			5.2			—			(0.2		)	87.2
Other operating expense	26.2			5.1			—			7.1			—			38.4
Total Expenses	587.7			88.4			149.0			73.2			(0.2		)	898.1
Other Income (Expense)
Net gain (loss) on asset dispositions	67.2			6.8			(0.1		)	5.3			—			79.2
Interest expense, net	(102.1		)	(22.4		)	(5.3		)	(20.0		)	(5.3		)	(155.1		)
Other expense	(5.2		)	(6.0		)	(0.7		)	—			(1.3		)	(13.2		)
Share of affiliates' earnings (pretax) (1)	0.5			(0.3		)	—			45.2			—			45.4
Segment profit (loss)	$	379.5		$	70.1		$	15.1		$	49.8		$	(6.4	)	508.1
Selling, general and administrative expense																192.4
Income taxes (including $0.5 tax benefits related to affiliates' earnings)																110.4
Net income																$	205.3
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	66.6			—			—			23.7			—			$	90.3
Residual sharing income	0.8			—			—			12.6			—			13.4
Non-remarketing disposition gains (2)	2.3			7.2			(0.1		)	—			—			9.4
Asset impairment	(2.5		)	(0.4		)	—			(31.0		)	—			(33.9		)
	$	67.2		$	6.8		$	(0.1	)	$	5.3		$	—		$	79.2
Capital Expenditures
Portfolio investments and capital additions	$	524.5		$	148.0		$	20.3		$	18.4		$	3.5		$	714.7
Selected Balance Sheet Data
Investments in affiliated companies	$	12.0		$	1.4		$	—		$	335.1		$	—		$	348.5
Identifiable assets	$	4,629.1		$	1,117.6		$	284.7		$	636.5		$	226.3		$	6,894.2

__________

(1) Includes a $19.0 million impairment loss in the Portfolio Management segment.

(2) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2014 Profitability
Revenues
Lease revenue	$	864.1		$	188.6		$	4.2		$	29.7		$	—		$	1,086.6
Marine operating revenue	—			—			223.0			63.3			—			286.3
Other revenue	63.4			10.3			—			4.4			—			78.1
Total Revenues	927.5			198.9			227.2			97.4			—			1,451.0
Expenses
Maintenance expense	265.5			45.9			25.6			—			—			337.0
Marine operating expense	—			—			149.2			48.6			—			197.8
Depreciation expense	190.0			47.1			13.6			22.8			—			273.5
Operating lease expense	103.7			—			5.2			—			(0.2		)	108.7
Other operating expense	21.9			5.1			—			1.9			—			28.9
Total Expenses	581.1			98.1			193.6			73.3			(0.2		)	945.9
Other Income (Expense)
Net gain (loss) on asset dispositions	72.3			6.0			(0.5		)	9.4			—			87.2
Interest expense, net	(98.4		)	(24.7		)	(5.6		)	(24.3		)	(5.4		)	(158.4		)
Other expense	(7.2		)	(3.1		)	(0.2		)	(1.2		)	(1.8		)	(13.5		)
Share of affiliates' earnings (pretax)	7.9			(0.3		)	—			60.2			—			67.8
Segment profit (loss)	$	321.0		$	78.7		$	27.3		$	68.2		$	(7.0	)	488.2
Selling, general and administrative expense																189.2
Income taxes (including $18.3 related to affiliates' earnings)																94.0
Net income																$	205.0
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	57.4		$	0.6		$	—		$	5.1		$	—		$	63.1
Residual sharing income	5.2			—			—			4.2			—			9.4
Non-remarketing disposition gains (1)	10.4			5.7			(0.1		)	—			—			16.0
Asset impairment	(0.7		)	(0.3		)	(0.4		)	0.1			—			(1.3		)
	$	72.3		$	6.0		$	(0.5	)	$	9.4		$	—		$	87.2
Capital Expenditures
Portfolio investments and capital additions	$	810.6		$	163.6		$	18.4		$	32.3		$	5.6		$	1,030.5
Selected Balance Sheet Data
Investments in affiliated companies	$	17.2		$	1.8		$	—		$	338.7		$	—		$	357.7
Identifiable assets	$	4,358.2		$	1,228.8		$	286.7		$	813.3		$	232.9		$	6,919.9

__________

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2013 Profitability
Revenues
Lease revenue	$	758.9		$	180.2		$	4.2		$	31.9		$	—		$	975.2
Marine operating revenue	—			—			223.5			51.6			—			275.1
Other revenue	58.2			8.8			—			3.7			—			70.7
Total Revenues	817.1			189.0			227.7			87.2			—			1,321.0
Expenses
Maintenance expense	228.2			42.9			22.9			—			—			294.0
Marine operating expense	—			—			151.3			38.5			—			189.8
Depreciation expense	176.7			43.2			12.1			23.0			—			255.0
Operating lease expense	124.4			—			5.2			—			(0.2		)	129.4
Other operating expense	18.4			5.3			—			2.4			—			26.1
Total Expenses	547.7			91.4			191.5			63.9			(0.2		)	894.3
Other Income (Expense)
Net gain (loss) on asset dispositions	67.7			3.7			(1.3		)	15.5			—			85.6
Interest expense, net	(106.0		)	(23.9		)	(6.2		)	(26.7		)	(3.8		)	(166.6		)
Other expense (income)	(9.8		)	(1.1		)	0.2			1.4			0.9			(8.4		)
Share of affiliates' earnings (pretax)	10.3			21.1			—			60.9			—			92.3
Segment profit (loss)	$	231.6		$	97.4		$	28.9		$	74.4		$	(2.7	)	429.6
Selling, general and administrative expense																178.3
Income taxes (including $16.5 related to affiliates' earnings)																82.0
Net income																$	169.3
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	51.1		$	0.3		$	—		$	8.6		$	—		$	60.0
Residual sharing income	3.4			—			—			7.4			—			10.8
Non-remarketing disposition gains (1)	14.5			6.2			—			—			—			20.7
Asset impairment	(1.3		)	(2.8		)	(1.3		)	(0.5		)	—			(5.9		)
	$	67.7		$	3.7		$	(1.3	)	$	15.5		$	—		$	85.6
Capital Expenditures
Portfolio investments and capital additions	$	502.4		$	168.5		$	11.2		$	170.5		$	7.0		$	859.6
Selected Balance Sheet Data
Investments in affiliated companies	$	31.4		$	2.0		$	—		$	320.9		$	—		$	354.3
Identifiable assets	$	3,710.3		$	1,296.2		$	271.0		$	856.9		$	401.1		$	6,535.5

__________

(1) Includes scrapping gains.

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Schedule I - Condensed Financial Information of Registrant

12 Months Ended

Dec. 31, 2015

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Financial Information of Registrant

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT

GATX CORPORATION

(Parent Company)

BALANCE SHEETS

(In millions)

	December 31
	2015		2014
Assets
Cash and cash equivalents	$	147.6	$	162.3
Operating assets and facilities, net	3,373.6		3,397.0
Investments in affiliated companies	2,255.3		2,199.5
Other assets	709.4		396.0
Total Assets	$	6,485.9	$	6,154.8
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	$	72.0	$	54.9
Debt	4,107.7		3,821.1
Other liabilities	1,026.0		964.8
Total Liabilities	5,205.7		4,840.8
Total Shareholders’ Equity	1,280.2		1,314.0
Total Liabilities and Shareholders’ Equity	$	6,485.9	$	6,154.8

See accompanying note to condensed financial statements.

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONT’D)

GATX CORPORATION

(Parent Company)

STATEMENTS OF COMPREHENSIVE INCOME

(In millions)

	Year Ended December 31
	2015			2014			2013
Revenues
Lease revenue	$	718.3		$	669.7		$	543.0
Other revenue	66.7			60.2			51.3
Total Revenues	785.0			729.9			594.3
Expenses
Maintenance expense	233.6			227.6			176.5
Depreciation expense	164.8			147.7			131.1
Operating lease expense	61.7			83.0			89.5
Other operating expense	25.4			17.1			12.7
Selling, general and administrative expense	149.2			139.7			131.1
Total Expenses	634.7			615.1			540.9
Other Income (Expense)
Net gain on asset dispositions	48.0			67.9			68.6
Interest expense, net	(68.7		)	(66.7		)	(63.7		)
Other income (expense)	—			2.5			(7.0		)
Income before Income Taxes and Share of Affiliates' Earnings	129.6			118.5			51.3
Income Taxes	(62.4		)	(41.7		)	(10.7		)
Share of Affiliates' Earnings, Net of Taxes	138.1			128.2			128.7
Net Income	$	205.3		$	205.0		$	169.3
Other Comprehensive Income, Net of Taxes
Foreign currency translation adjustments	(55.8		)	(79.1		)	25.8
Unrealized (loss) gain on securities	(0.6		)	(0.1		)	0.8
Unrealized (loss) gain on derivative instruments	(1.8		)	3.0			22.4
Post-retirement benefit plans	7.8			(29.5		)	52.9
Other comprehensive (loss) income	(50.4		)	(105.7		)	101.9
Comprehensive Income	$	154.9		$	99.3		$	271.2

See accompanying note to condensed financial statements.

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONT’D)

GATX CORPORATION

(Parent Company)

STATEMENTS OF CASH FLOWS

(In millions)

	Year Ended December 31
	2015			2014			2013
Operating Activities
Net cash provided by operating activities	$	412.5		$	219.5		$	104.3
Investing Activities
Capital additions	(602.9		)	(748.1		)	(513.5		)
Purchases of leased-in assets	(118.4		)	(150.5		)	(61.4		)
Proceeds from sale-leasebacks	—			—			90.7
Portfolio proceeds and other	208.7			169.5			320.7
Net cash used in investing activities	(512.6		)	(729.1		)	(163.5		)
Financing Activities
Repayments of debt (original maturities longer than 90 days)	(350.0		)	(692.2		)	(483.8		)
Net increase (decrease) in debt with original maturities of 90 days or less	(69.0		)	69.0			(185.0		)
Proceeds from issuances of debt (original maturities longer than 90 days)	695.7			1,188.7			967.0
Stock repurchased	(125.4		)	(124.6		)	(68.6		)
Dividends	(68.2		)	(62.0		)	(60.5		)
Other	2.3			(1.6		)	1.2
Net cash provided by financing activities	85.4			377.3			170.3
Net (decrease) increase in cash and cash equivalents during the year	(14.7		)	(132.3		)	111.1
Cash and Cash Equivalents at beginning of year	162.3			294.6			183.5
Cash and Cash Equivalents at end of year	$	147.6		$	162.3		$	294.6

See accompanying note to condensed financial statements.

Note to Condensed Financial Statements

Basis of Presentation

The condensed financial statements represent the Balance Sheets, Statements of Comprehensive Income and Cash Flows of GATX Corporation, the parent company. In these parent-company-only financial statements, our investment in subsidiaries and joint ventures (collectively "affiliates") is stated at cost plus equity in undistributed earnings of affiliates since the date of acquisition. Our share of net income from affiliates is included in consolidated net income using the equity method. The parent-company-only financial statements should be read in conjunction with our consolidated financial statements.

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Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Basis of presentation

Basis of Presentation

We prepared the accompanying consolidated financial statements in accordance with US generally accepted accounting principles ("GAAP"). Certain prior year amounts may have been reclassified to conform to the 2015 presentation.

Use of Estimates

Use of Estimates

Preparing financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the amounts we report. We regularly evaluate our estimates and judgments based on historical experience and other relevant facts and circumstances. Actual amounts could differ from our estimates.

Consolidation

Consolidation

Our consolidated financial statements include our assets, liabilities, revenues, and expenses, as well as the assets, liabilities, revenues, and expenses of subsidiaries in which we have a controlling financial interest and variable interest entities for which we are the primary beneficiary. We have eliminated intercompany transactions and balances. Our consolidated subsidiaries include the following wholly owned, bankruptcy-remote special purpose corporations that finance and lease railcars: General American Railcar Corporation, General American Railcar Corporation III, General American Marks Company, and GARC LLC. The debt and lease obligations of these special purpose corporations are nonrecourse to us, and their assets are available first to satisfy claims of their creditors.

Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block]

Our consolidated financial statements include our assets, liabilities, revenues, and expenses, as well as the assets, liabilities, revenues, and expenses of subsidiaries in which we have a controlling financial interest and variable interest entities for which we are the primary beneficiary. We have eliminated intercompany transactions and balances. Our consolidated subsidiaries include the following wholly owned, bankruptcy-remote special purpose corporations that finance and lease railcars: General American Railcar Corporation, General American Railcar Corporation III, General American Marks Company, and GARC LLC. The debt and lease obligations of these special purpose corporations are nonrecourse to us, and their assets are available first to satisfy claims of their creditors. 

Investments in Affiliated Companies

Investments in Affiliates

We use the equity method to account for investments in joint ventures and other unconsolidated entities if we have the ability to exercise significant influence over the financial and operating policies of those investees. Under the equity method, we record our initial investments in these entities at cost and subsequently adjust the investment for our share of the affiliates’ undistributed earnings (losses), and distributions. We include loans to and from affiliates as part of our investment in the affiliate and include interest on any such loans in our share of the affiliates’ earnings. We review the carrying amount of our investments in affiliates annually, or whenever circumstances indicate that the value of these investments may have declined. If we determine an investment is impaired on an other-than-temporary basis, we record a loss equal to the difference between the fair value of the investment and its carrying value. See "Note 7. Investments in Affiliated Companies."

Variable Interest Entities

Variable Interest Entities

We evaluate whether an entity is a variable interest entity based on the sufficiency of the entity’s equity and by determining whether the equity holders have the characteristics of a controlling financial interest. To determine if we are the primary beneficiary of a variable interest entity, we assess whether we have the power to direct the activities that most significantly impact the economic performance of the entity as well as the obligation to absorb losses or the right to receive benefits that may be significant to the entity. These determinations are both qualitative and quantitative, and they require us to make judgments and assumptions about the entity’s forecasted financial performance and the volatility inherent in those forecasted results. We evaluate new investments for variable interest entity determination and regularly review all existing entities for events that may result in an entity becoming a variable interest entity or us becoming the primary beneficiary of an existing variable interest entity. See "Note 8. Variable Interest Entities."

Fair Value Measurements

Fair Value Measurements

Fair value is the price that a market participant would receive to sell an asset or pay to transfer a liability in an orderly transaction at the measurement date. We classify fair value measurements according to the three-level hierarchy defined by GAAP, and those classifications are based on our judgment about the reliability of the inputs we use in the fair value measurement. Level 1 inputs are quoted prices available in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly, and may include quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data. For assets or liabilities with a specified contractual term, Level 2 inputs must be observable for substantially the full term of that asset or liability. Level 3 inputs are unobservable, meaning they are supported by little or no market activity. Fair value measurements classified as Level 3 typically rely on pricing models and discounted cash flow methodologies, both of which require significant judgment. See "Note 10. Fair Value Disclosure

Cash and Cash Equivalents

Cash and Cash Equivalents

We classify all highly liquid investments with a maturity of three months or less when purchased as cash equivalents

Restricted cash

Restricted Cash

Restricted cash is cash and cash equivalents that are restricted as to withdrawal and use. Our restricted cash primarily relates to contractually required cash amounts we maintain for two wholly owned bankruptcy-remote, special purpose corporations.

Operating Assets and Facilities

Operating Assets and Facilities

We state operating assets, facilities, and capitalized improvements at cost. We include assets we acquire under capital leases in operating assets, and we record the related obligations as liabilities. We depreciate operating assets and facilities over their estimated useful lives or lease terms to estimated residual values using the straight-line method. We depreciate leasehold improvements over the shorter of their useful lives or the lease term. Our estimated depreciable lives of operating assets and facilities are as follows:

Railcars	20–42 years
Locomotives	10–20 years
Buildings	40–50 years
Leasehold improvements	5–15 years
Marine vessels	30–65 years
Other equipment	5–30 years

We review long-lived assets for impairment whenever circumstances indicate that the carrying amount of those assets may not be recoverable. We evaluate the recoverability of assets to be held and used by comparing the carrying amount of the asset to the undiscounted future net cash flows we expect the asset to generate. If we determine an asset is impaired, we recognize an impairment loss equal to the amount the carrying amount exceeds the asset’s fair value. We classify assets we plan to sell or otherwise dispose of as held for sale, provided they meet specified accounting criteria, and we record those assets at the lower of their carrying amount or fair value less costs to sell

Lease Classification

Lease Classification

We determine the classification of a lease at its inception. If the provisions of the lease subsequently change, other than by renewal or extension, we evaluate whether that change would have resulted in a different lease classification had the change been in effect at inception. If so, the revised agreement is considered a new lease for lease classification purposes. See "Note 5. Leases."

Operating Leases

We offer full-service and net operating leases. We price full-service leases as an integrated service that includes amounts related to executory costs, such as maintenance, insurance, and ad valorem taxes. We do not offer stand-alone maintenance service contracts and are unable to separate executory costs from full-service lease revenue. We recognize operating lease revenue, including amounts related to executory costs, on a straight-line basis over the term of the underlying lease. As a result, we may not recognize lease revenue in the same period as maintenance and other executory costs, which we expense as incurred. See "Note 5. Leases."

Finance Leases

For finance leases, we record a gross lease payment receivable and an estimated residual value, net of unearned income. For sales-type leases, we may also recognize a gain or loss in the period the lease is recorded. Gross lease payment receivables are the rents we expect to receive through the end of the lease term for a leased asset. Estimated residual values are our estimates of value of an asset at the end of a finance lease term. We review our estimates of residual values annually or whenever circumstances indicate that residual values may have declined. Other-than-temporary declines in value are recognized as impairments. Initial unearned income is the amount that the original lease payment receivable and the estimated residual value of the leased asset exceeds the original cost or carrying value of the leased asset. We amortize unearned income to lease revenue using the interest method, which produces a constant yield over the lease term. We also defer the initial direct costs related to our direct finance leases and amortize those costs over the lease term as an adjustment to lease revenue.

We regularly review the finance lease portfolio and classify finance leases as non-performing if it is probable that we will be unable to collect all amounts due under the lease. We generally stop accruing income on non-performing finance leases until all contractual payments are current. We apply payments we receive for non-performing finance leases to the lease payment receivable. See "Note 5. Leases."

Loans

Loans

We record loans at their principal amount outstanding adjusted for allowances, deferred fees, unamortized premiums or discounts, and accrued interest. We review the loan portfolio regularly and classify a loan as impaired when it is probable that we will be unable to collect all amounts due under the loan agreement. Since most loans are collateralized, we generally measure impairment as the amount the carrying value of the loan exceeds the expected repayments, including any value attributable to underlying collateral. We do not typically recognize interest income on impaired loans until the loan has been paid to contractually current status. We offset loan origination fees by the related direct loan origination costs for a given loan and amortize the net amount of those costs over the term of the loan as an adjustment to interest income. See "Note 6. Loans."

Allowance for Losses

Allowance for Losses

The allowance for losses is our estimate of credit losses associated with reservable assets. Reservable assets are divided into two categories: rent and other receivables, which includes short-term trade billings, and loans and finance lease receivables. We base our loss reserves for rent and other receivables on historical loss experience and judgments about the impact of economic conditions, the state of the markets we operate in, and collateral values, if applicable. In addition, we may establish specific reserves for known troubled accounts. We evaluate reserve estimates for loans and finance lease receivables on a customer-specific basis, considering each customer's particular credit situation. We also consider the factors we use to evaluate rent and other receivables, which are outlined above. We charge amounts against the allowance when we deem them uncollectable. We made no material changes in our estimation methods or assumptions for the allowance during 2015. We believe that the allowance is adequate to cover losses inherent in our reservable assets as of December 31, 2015. Since the allowance is based on judgments and estimates, it is possible that actual losses incurred will differ from the estimate. See "Note 19. Allowance for Losses."

Goodwill

Goodwill

We recognize goodwill when the consideration paid to acquire a business exceeds the fair value of the net assets acquired.  We assign goodwill to the same reporting unit as the net assets of the acquired business and we assess our goodwill for impairment on an annual basis in the fourth quarter, or during interim periods if impairment indicators are present. If the carrying amount of the applicable reporting unit exceeds its fair value, we compare the implied fair value of the reporting unit’s goodwill with the carrying amount of goodwill. We record an impairment loss if the carrying amount of goodwill exceeds its implied fair value. The fair values of our reporting units are determined using discounted cash flow models. See "Note 18. Goodwill.

Income Taxes

Income Taxes

We calculate provisions for federal, state, and foreign income taxes on our reported income before income taxes. We base our calculations of deferred tax assets and liabilities on the differences between the financial statement and tax bases of assets and liabilities, using enacted rates in effect for the year we expect the differences will reverse. We reflect the cumulative effect of changes in tax rates from those we previously used to determine deferred tax assets and liabilities in the provision for income taxes in the period the change is enacted. Provisions for income taxes in any given period differ from those currently payable or receivable because certain items of income and expense are recognized in different periods for financial reporting purposes than for income tax purposes. We may deduct expenses or defer income attributable to uncertain tax positions for tax purposes, however, we have not recognized a tax benefit in the financial statements for those items. We include our liability for uncertain tax positions in other liabilities on the balance sheet. See "Note 14. Income Taxes."

Derivatives

Derivatives

We use derivatives, such as interest rate swap agreements, Treasury rate locks, options, and currency forwards, to hedge our exposure to interest rate and foreign currency exchange rate risk on existing and anticipated transactions. We formally designate derivatives that meet specific accounting criteria as qualifying hedges at inception. These criteria require us to have the expectation that the derivative will be highly effective at offsetting changes in the fair value or expected cash flows of the hedged exposure, both at the inception of the hedging relationship and on an ongoing basis.

We recognize all derivative instruments at fair value and classify them on the balance sheet as either other assets or other liabilities. We generally base the classification of derivative activity in the statements of comprehensive income and cash flows on the nature of the hedged item. For derivatives we designate as fair value hedges, we recognize changes in the fair value of both the derivative and the hedged item in earnings. For derivatives we designate as cash flow hedges, we record the effective portion of the change in the fair value of the derivative as part of other comprehensive income (loss), and we recognize those changes in earnings in the period the hedged transaction affects earnings. We recognize any ineffective portion of the change in the fair value of the derivative immediately in earnings. Although we do not hold or issue derivative financial instruments for purposes other than hedging, we do not designate certain derivatives as accounting hedges. We recognize changes in the fair value of these derivatives in earnings immediately. We classify gains and losses on derivatives that are not designated as hedges as other expenses, and we include the related cash flows in cash flows from operating activities. See "Note 10. Fair Value Disclosure

Defined Benefit Pension and Other Post-Retirement Plans

Defined Benefit Pension and Other Post-Retirement Plans

Our balance sheet reflects the funded status of our pension and post-retirement plans, which is the difference between the fair value of the plan assets and the projected benefit obligation. We recognize the aggregate overfunding of any plans in other assets, the aggregate underfunding of any plans in other liabilities, and the corresponding adjustments for unrecognized actuarial gains (losses) and prior service cost (credits) in accumulated other comprehensive income (loss). See "Note 12. Pension and Other Post-Retirement Benefits."

Foreign Currency

Foreign Currency

We translate the assets and liabilities of our operations that have non-US dollar functional currencies at exchange rates in effect at year-end. Revenue, expenses, and cash flows are translated monthly using average exchange rates. We defer gains and losses resulting from foreign currency translation and record those gains and losses as a separate component of accumulated other comprehensive income (loss). Gains and losses resulting from foreign currency transactions and from the remeasurement of non-functional currency assets and liabilities are recorded net of related hedges in other expense during the periods in which they occur. Net gains (losses) were $1.1 million, $(3.4) million and $2.1 million for 2015, 2014, and 2013.

Environmental Liabilities

Environmental Liabilities

We record accruals for environmental remediation costs at sites relating to past or discontinued operations when they are probable and when we can reasonably estimate the expected costs. We record adjustments to initial estimates as necessary. Since these accruals are based on estimates, actual environmental remediation costs may differ. We expense or capitalize environmental remediation costs related to current or future operations as appropriate. See "Note 24. Legal Proceedings and Other Contingencies.

Revenue Recognition

Marine Operating Revenue

We recognize marine operating revenue as we perform shipping services, and we allocate revenue among reporting periods based on the relative transit time in each reporting period for shipments in process.

Other Revenue

We include customer liability repair revenue, fee income, interest on loans, and other miscellaneous revenues in other revenue. We recognize these revenues when earned, which, in the case of management fees we receive from affiliates, is when we perform the related services.

Interest expense, net

Interest Expense, net

Interest expense is the interest we accrue on indebtedness and the amortization of debt issuance costs and debt discounts and premiums. We defer debt issuance costs and debt discounts and premiums and amortize them over the term of the related debt. We report interest expense net of interest income on bank deposits. Interest income on bank deposits was $1.1 million in 2015, $0.9 million in 2014, and $1.2 million in 2013.

Operating Lease Expense

Operating Lease Expense

We classify leases of certain railcars and other assets and facilities, such as maintenance facilities and equipment, as operating leases. We record the lease expense associated with these leases on a straight-line basis. We defer gains and financing costs associated with sale-leasebacks and amortize those gains and costs as a component of operating lease expense over the related leaseback term. We also classify our leases of office facilities and related administrative assets as operating leases, and we record the associated expense in selling, general and administrative expense. See "Note 5. Leases."

Maintenance and Repair Costs

Maintenance and Repair Costs

We expense maintenance and repair costs as incurred. We capitalize certain costs incurred in connection with planned major maintenance activities if those activities improve the asset or extend its useful life. We depreciate those capitalized costs over the estimated useful life of the improvement. We capitalize required regulatory survey costs for vessels and amortize those costs over the applicable survey period, which is generally five years.

ASC Expense Seasonality

ASC Expense Seasonality

ASC's sailing season runs from April 1 to December 31 of each year. We defer certain indirect expenses incurred prior to the beginning of the sailing season, such as winter maintenance, insurance, operating lease expense, and depreciation and amortize them ratably over the sailing season.

Share-Based Compensation

Share-Based Compensation

We base our measurement of share-based compensation expense on the grant date fair value of an award, and we recognize the expense net of estimated forfeitures over the requisite service period. Forfeiture rates at grant date are initially based on historical experience and are adjusted in subsequent periods if actual experience differs from the estimate. We record a final adjustment when those awards vest. See "Note 13. Share-Based Compensation

Net Gain on Asset Dispositions

Net Gain on Asset Dispositions

Net gain on disposition includes gains and losses on sales of operating assets and residual sharing income, which we also refer to as asset remarketing income; non-remarketing disposition gains, primarily from scrapping of railcars; and asset impairment losses. We recognize disposition gains, including non-remarketing gains, upon completion of the sale or scrapping of operating assets. Residual sharing income includes fees we receive from the sale of managed assets and assets subject to residual value guarantees, and we recognize these fees upon completion of the underlying transactions.

Other Income (Expense)

Other Income (Expense)

We include fair value adjustments on certain financial instruments, gains and/or losses on foreign currency transactions and remeasurements, legal defense costs and litigation settlements, along with other miscellaneous income and expense items in other income (expense).

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Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Estimated lives of useful depreciable assets

Operating Assets and Facilities

We state operating assets, facilities, and capitalized improvements at cost. We include assets we acquire under capital leases in operating assets, and we record the related obligations as liabilities. We depreciate operating assets and facilities over their estimated useful lives or lease terms to estimated residual values using the straight-line method. We depreciate leasehold improvements over the shorter of their useful lives or the lease term. Our estimated depreciable lives of operating assets and facilities are as follows:

Railcars	20–42 years
Locomotives	10–20 years
Buildings	40–50 years
Leasehold improvements	5–15 years
Marine vessels	30–65 years
Other equipment	5–30 years

Net gain on disposition of assets

The following table presents the net gain on asset dispositions for the years ending December 31 (in millions):

	2015			2014			2013
Disposition gains	$	90.3		$	63.1		$	60.0
Residual sharing income	13.4			9.4			10.8
Non-remarketing disposition gains	9.4			16.0			20.7
Asset impairment losses (1)	(33.9		)	(1.3		)	(5.9		)
Net Gain on Asset Dispositions	$	79.2		$	87.2		$	85.6

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Supplemental Cash Flow and Noncash Investing Transactions (Tables)

12 Months Ended

Dec. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	2015		2014		2013
Supplemental Cash Flow Information (in millions)
Interest paid (1)	$	144.4	$	142.6	$	148.7
Income taxes paid, net	13.3		18.7		7.4

________

(1) Interest paid consisted of interest on debt obligations, interest rate swaps (net of interest received), and capital leases. The interest expense we capitalized as part of the cost of construction of major assets was immaterial for all periods presented.

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Leases (Tables)

12 Months Ended

Dec. 31, 2015

Leases [Abstract]

Components of GATX's finance leases

GATX as Lessor

The following table shows the components of our direct finance leases as of December 31 (in millions):

	2015			2014
Total contractual lease payments receivable	$	199.6		$	204.8
Estimated unguaranteed residual value of leased assets	58.7			68.5
Unearned income	(90.7		)	(98.6		)
Finance leases	$	167.6		$	174.7

Minimum Future Receipts

The following table shows our future contractual receipts from finance leases and noncancelable operating leases as of December 31, 2015 (in millions):

	Finance Leases		Operating Leases (1)		Total
2016	$	28.3	$	970.3	$	998.6
2017	25.9		815.1		841.0
2018	23.9		684.3		708.2
2019	22.6		568.1		590.7
2020	21.1		442.6		463.7
Years thereafter	77.8		912.2		990.0
	$	199.6	$	4,392.6	$	4,592.2

Assets that are financed with capital lease obligations

The following table shows assets we financed with capital lease obligations as of December 31 (in millions):

	2015			2014
Railcars	$	17.8		$	—
Marine vessels	84.5			83.1
Less: allowance for depreciation	(79.8		)	(75.3		)
	$	22.5		$	7.8

Future minimum rental payments due under noncancelable operating leases

uture contractual rental payments due under noncancelable leases as of December 31, 2015 (in millions):

	Capital Leases			Recourse Operating Leases
2016	$	4.3		$	85.1
2017	2.8			91.7
2018	1.6			83.0
2019	11.5			79.8
2020	—			72.7
Years thereafter	—			244.0
	$	20.2		$	656.3
Less: amounts representing interest	(1.8		)
Present value of future contractual capital lease payments	$	18.4

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Investments in Affiliated Companies (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Equity Method Investments [Line Items]

Significant Investments in Affiliated Companies, by Segment

The following table presents our most significant investments in affiliated companies and our ownership percentage in those companies by segment as of December 31, 2015 (in millions):

	Segment	Investment		Percentage Ownership
Rolls-Royce & Partners Finance (1)	Portfolio Management	$	335.1	50.0	%
Adler Funding LLC	Rail North America	11.7		12.5	%
Other affiliates	Various	1.7		Various
Investments in Affiliated Companies		$	348.5

__________

(1) Combined investment balances of fifteen separate joint ventures (collectively, the "RRPF affiliates")

Equity Method Investments, Earnings by Segment

The following table shows our share of affiliates’ earnings by segment for the years ending December 31 (in millions):

	2015			2014			2013
Rail North America	$	0.5		$	7.9		$	10.3
Rail International	(0.3		)	(0.3		)	21.1
Portfolio Management (1)	45.2			60.2			60.9
Share of affiliates' earnings (pretax)	45.4			67.8			92.3
Income taxes	0.5			(18.3		)	(16.5		)
Share of Affiliates' Earnings	$	45.9		$	49.5		$	75.8

Equity method Investments, Investments and Distributions

The following table shows our cash investments in and distributions and loan payments from our affiliates by segment for the years ended December 31 (in millions):

	Cash Investments						Cash Distributions (1)
	2015		2014		2013		2015		2014		2013
Rail North America	$	—	$	—	$	—	$	5.1	$	20.0	$	—
Portfolio Management	15.5		15.3		101.3		32.2		34.2		47.0
	$	15.5	$	15.3	$	101.3	$	37.3	$	54.2	$	47.0

Equity Method Investments, Guarantees

Investments in affiliated companies represent investments in and loans to domestic and foreign affiliates, and primarily include companies offering lease financing and related services for customers operating rail and marine assets, as well as entities that lease aircraft spare engines. Loan amounts included in investments in affiliated companies were $11.2 million as of December 31, 2015 and $16.3 million as of December 31, 2014.

In 2015, as a result of our decision to exit the majority of our marine investments within our Portfolio Management segment, we recorded a $19.0 million impairment loss and then sold our 50% interest in the Cardinal Marine joint venture. We received aggregate cash proceeds of $24.7 million from this sale.

In 2014, we sold our investments in the Intermodal Investment Fund V and Intermodal Investment Fund VII affiliates. As a result of these sales, we received aggregate cash proceeds of $18.3 million.

In 2013, we dissolved our Singco and Somargas marine affiliates, taking direct ownership of five liquefied gas carrying vessels with a fair value of $151.8 million. In connection with the dissolution we paid $101.3 million, primarily to satisfy our share of the affiliates' external debt, and recognized a pretax gain of $2.5 million, which is recorded in share of affiliates' earnings. The vessels continue to operate in a vessel pooling arrangement that our former partner manages.

In 2013, we sold our 37.5% interest in AAE to our partner, Ahaus Alstätter Eisenbahn Holding AG (“AAE Holding”), and recognized a pretax gain of $9.3 million, which we reported as part of our share of affiliates' earnings. The sale price of $114.1 million consisted of a cash payment at closing of $23.0 million and a seller loan of €67.5 million ($91.1 million) at a market interest rate. The loan was paid in full in January 2015.

The following table presents our most significant investments in affiliated companies and our ownership percentage in those companies by segment as of December 31, 2015 (in millions):

	Segment	Investment		Percentage Ownership
Rolls-Royce & Partners Finance (1)	Portfolio Management	$	335.1	50.0	%
Adler Funding LLC	Rail North America	11.7		12.5	%
Other affiliates	Various	1.7		Various
Investments in Affiliated Companies		$	348.5

__________

(1) Combined investment balances of fifteen separate joint ventures (collectively, the "RRPF affiliates").

The following table shows our share of affiliates’ earnings by segment for the years ending December 31 (in millions):

	2015			2014			2013
Rail North America	$	0.5		$	7.9		$	10.3
Rail International	(0.3		)	(0.3		)	21.1
Portfolio Management (1)	45.2			60.2			60.9
Share of affiliates' earnings (pretax)	45.4			67.8			92.3
Income taxes	0.5			(18.3		)	(16.5		)
Share of Affiliates' Earnings	$	45.9		$	49.5		$	75.8

__________

(1) Includes a $19.0 million impairment loss in 2015.

The following table shows our cash investments in and distributions and loan payments from our affiliates by segment for the years ended December 31 (in millions):

	Cash Investments						Cash Distributions (1)
	2015		2014		2013		2015		2014		2013
Rail North America	$	—	$	—	$	—	$	5.1	$	20.0	$	—
Portfolio Management	15.5		15.3		101.3		32.2		34.2		47.0
	$	15.5	$	15.3	$	101.3	$	37.3	$	54.2	$	47.0

__________

(1) Cash distributions exclude proceeds from sales of affiliates of $24.7 million in 2015, $19.4 million in 2014, and $55.6 million in 2013.

Summarized Financial Data of Affiliates

The following table shows the aggregated operating results for the years ended December 31 for the affiliated companies we held at December 31 (in millions):

	2015		2014		2013
Revenues	$	339.3	$	339.0	$	334.5
Gains on sales of assets	37.6		33.7		43.5
Net income	121.4		99.6		108.6

The following table shows aggregated summarized balance sheet data for our affiliated companies as of December 31 (in millions):

	2015		2014
Current assets	$	185.0	$	211.6
Noncurrent assets	3,254.1		3,195.1
Total assets	$	3,439.1	$	3,406.7
Current liabilities	$	285.5	$	378.4
Noncurrent liabilities	2,512.2		2,388.2
Shareholders’ equity	641.4		640.1
Total liabilities and shareholders' equity	$	3,439.1	$	3,406.7

Summarized Financial Data for the RRPF Affiliates

As noted above, our affiliate investments include 50% interests in each of the RRPF affiliates, a collection of fifteen domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. The RRPF affiliates are primarily engaged in two business activities: lease financing of aircraft spare engines to a diverse group of commercial aircraft operators worldwide and lease financing of aircraft spare engines to Rolls-Royce for use in their engine maintenance programs. In aggregate, the RRPF affiliates own 436 aircraft engines at December 31, 2015, of which 224 were on lease to Rolls-Royce. Aircraft engines are generally depreciated over a useful life of 25 years to an estimated residual value. Lease terms vary but typically range from 7 to 10 years. Rolls-Royce manages each of the RRPF affiliates and also performs substantially all required maintenance activities. Our share of affiliates' earnings (after-tax) from the RRPF affiliates was $58.4 million in 2015, $42.2 million in 2014, and $46.5 million in 2013.

We derived the following financial information from the combined financial statements of the RRPF affiliates.

The following table shows condensed income statements of the RRPF affiliates for the years ending December 31 (in millions):

	2015			2014			2013
Lease revenue from third parties	$	191.4		$	176.9		$	147.6
Lease revenue from Rolls-Royce	138.7			124.7			119.7
Depreciation expense	(166.1		)	(140.7		)	(120.2		)
Interest expense	(56.7		)	(59.5		)	(65.8		)
Other expenses	(8.8		)	(11.8		)	(10.2		)
Gains on sales of assets	33.1			22.7			35.2
Income before income taxes	131.6			112.3			106.3
Income tax benefits (provision) (1)	(9.0		)	(17.3		)	0.4
Net income	$	122.6		$	95.0		$	106.7

_________

(1) Represents income taxes directly attributable to the RRPF affiliates in the United Kingdom. Several of the RRPF affiliates are flow through entities and income taxes are incurred at the owner level. Amounts shown for 2015 and 2013 include deferred income tax benefits of approximately $15.4 million and $15.2 million, attributable to statutory rate decreases enacted in the United Kingdom.

The following table shows the condensed balance sheets of the RRPF affiliates as of December 31 (in millions):

	2015		2014
Current assets	$	173.4	$	146.3
Noncurrent assets, including operating assets, net of accumulated depreciation of $993.6 and $862.8 (a)	3,161.4		2,988.1
Total assets	$	3,334.8	$	3,134.4
Current liabilities, excluding debt	$	85.1	$	74.4
Debt obligations	2,391.1		2,295.7
Other liabilities	231.4		219.4
Shareholders’ equity	627.2		544.9
Total liabilities and shareholders' equity	$	3,334.8	$	3,134.4

_________

(a) All operating assets were pledged as collateral for long-term debt obligations.

The following table shows contractual future lease receipts from noncancelable leases of the RRPF affiliates as of December 31, 2015 (in millions):

	Rolls-Royce		Third Parties		Total
2016	$	144.1	$	157.7	$	301.8
2017	122.9		147.5		270.4
2018	119.0		126.9		245.9
2019	114.0		84.5		198.5
2020	93.3		72.4		165.7
Thereafter	239.5		247.2		486.7
	$	832.8	$	836.2	$	1,669.0

The following table shows maturities of debt obligations of the RRPF affiliates as of December 31, 2015 (in millions):

2016	$	187.6
2017	279.6
2018	134.3
2019	238.2
2020	470.7
Thereafter	1,076.7
Total debt principal (1)	$	2,387.1

_________

(1) All debt obligations are nonrecourse to the shareholders.

Equity Method Investments, Summarized Financial Data

The following table shows the aggregated operating results for the years ended December 31 for the affiliated companies we held at December 31 (in millions):

	2015		2014		2013
Revenues	$	339.3	$	339.0	$	334.5
Gains on sales of assets	37.6		33.7		43.5
Net income	121.4		99.6		108.6

The following table shows aggregated summarized balance sheet data for our affiliated companies as of December 31 (in millions):

	2015		2014
Current assets	$	185.0	$	211.6
Noncurrent assets	3,254.1		3,195.1
Total assets	$	3,439.1	$	3,406.7
Current liabilities	$	285.5	$	378.4
Noncurrent liabilities	2,512.2		2,388.2
Shareholders’ equity	641.4		640.1
Total liabilities and shareholders' equity	$	3,439.1	$	3,406.7

Schedule of Future Minimum Lease Payments Receivable

The following table shows our future contractual receipts from finance leases and noncancelable operating leases as of December 31, 2015 (in millions):

	Finance Leases		Operating Leases (1)		Total
2016	$	28.3	$	970.3	$	998.6
2017	25.9		815.1		841.0
2018	23.9		684.3		708.2
2019	22.6		568.1		590.7
2020	21.1		442.6		463.7
Years thereafter	77.8		912.2		990.0
	$	199.6	$	4,392.6	$	4,592.2

Schedule of Maturities of Debt Obligations

The following table shows the scheduled principal payments of our debt obligations as of December 31, 2015 (in millions):

2016	$	564.8
2017	412.7
2018	517.9
2019	550.0
2020	350.0
Thereafter	1,810.0
Total debt principal	$	4,205.4

RRPF Joint Ventures [Member]

Schedule of Equity Method Investments [Line Items]

Equity Method Investments, Summarized Financial Data

The following table shows condensed income statements of the RRPF affiliates for the years ending December 31 (in millions):

	2015			2014			2013
Lease revenue from third parties	$	191.4		$	176.9		$	147.6
Lease revenue from Rolls-Royce	138.7			124.7			119.7
Depreciation expense	(166.1		)	(140.7		)	(120.2		)
Interest expense	(56.7		)	(59.5		)	(65.8		)
Other expenses	(8.8		)	(11.8		)	(10.2		)
Gains on sales of assets	33.1			22.7			35.2
Income before income taxes	131.6			112.3			106.3
Income tax benefits (provision) (1)	(9.0		)	(17.3		)	0.4
Net income	$	122.6		$	95.0		$	106.7

_________

(1) Represents income taxes directly attributable to the RRPF affiliates in the United Kingdom. Several of the RRPF affiliates are flow through entities and income taxes are incurred at the owner level. Amounts shown for 2015 and 2013 include deferred income tax benefits of approximately $15.4 million and $15.2 million, attributable to statutory rate decreases enacted in the United Kingdom.

The following table shows the condensed balance sheets of the RRPF affiliates as of December 31 (in millions):

	2015		2014
Current assets	$	173.4	$	146.3
Noncurrent assets, including operating assets, net of accumulated depreciation of $993.6 and $862.8 (a)	3,161.4		2,988.1
Total assets	$	3,334.8	$	3,134.4
Current liabilities, excluding debt	$	85.1	$	74.4
Debt obligations	2,391.1		2,295.7
Other liabilities	231.4		219.4
Shareholders’ equity	627.2		544.9
Total liabilities and shareholders' equity	$	3,334.8	$	3,134.4

_________

(a) All operating assets were pledged as collateral for long-term debt obligations.

Schedule of Future Minimum Lease Payments Receivable

The following table shows contractual future lease receipts from noncancelable leases of the RRPF affiliates as of December 31, 2015 (in millions):

	Rolls-Royce		Third Parties		Total
2016	$	144.1	$	157.7	$	301.8
2017	122.9		147.5		270.4
2018	119.0		126.9		245.9
2019	114.0		84.5		198.5
2020	93.3		72.4		165.7
Thereafter	239.5		247.2		486.7
	$	832.8	$	836.2	$	1,669.0

Schedule of Maturities of Debt Obligations

The following table shows maturities of debt obligations of the RRPF affiliates as of December 31, 2015 (in millions):

2016	$	187.6
2017	279.6
2018	134.3
2019	238.2
2020	470.7
Thereafter	1,076.7
Total debt principal (1)	$	2,387.1

_________

(1) All debt obligations are nonrecourse to the shareholders

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Loans (Tables)

12 Months Ended

Dec. 31, 2015

Loans Receivable, Net [Abstract]

Schedule of Loan Receivables, Minimum Payments

The following table shows scheduled loan principal payments due by year at December 31, 2015 (in millions):

2016	$	2.0
2017	2.0
2018	4.2
2019	0.1
2020	0.1
Thereafter	0.4
	$	8.8

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Variable Interest Entities (Tables)

12 Months Ended

Dec. 31, 2015

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Carrying amounts of assets and liabilities of consolidated VIE

The following table shows the carrying amounts of assets and liabilities of the consolidated variable interest entity as of December 31 (in millions):

	2015		2014
Operating assets, net of accumulated depreciation (1)	$	83.2	$	88.1
Nonrecourse debt	6.9		15.9

_________

(1) All operating assets are pledged as collateral on the nonrecourse debt.

Carrying amounts and maximum exposure to loss for non consolidated VIEs

The following table shows the carrying amounts and maximum exposure to loss for our unconsolidated variable interest entities as of December 31 (in millions):

	2015				2014
	Net Carrying Amount		Maximum Exposure to Loss		Net Carrying Amount		Maximum Exposure to Loss
Investments in affiliates	$	161.2	$	161.2	$	143.9	$	143.9
Other investment	0.2		0.2		0.4		0.4
Total	$	161.4	$	161.4	$	144.3	$	144.3

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Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Commercial Paper and Borrowings Under Bank Credit Facilities

Commercial Paper and Borrowings Under Bank Credit Facilities ($ in millions)

	December 31
	2015			2014
Balance	$	7.4		$	72.1
Weighted average interest rate	1.22		%	0.56		%

Outstanding balances of debt obligations and the applicable interest rates

utstanding balances of our debt obligations and the applicable interest rates as of December 31 ($ in millions):

	Date of Issue	Final Maturity	Interest Rate		2015		2014
Recourse Fixed Rate Debt
Unsecured	03/03/06	03/01/16	5.80	%	$	200.0	$	200.0
Unsecured	11/19/10	07/15/16	3.50	%	250.0		250.0
Unsecured	09/20/11	07/15/16	3.50	%	100.0		100.0
Unsecured	03/04/14	03/04/17	1.25	%	300.0		300.0
Unsecured	02/06/08	02/15/18	6.00	%	200.0		200.0
Unsecured	03/19/13	07/30/18	2.38	%	250.0		250.0
Unsecured (1)	12/27/10	10/31/18	3.84	%	10.9		15.7
Unsecured (1)	11/29/10	11/30/18	3.70	%	8.1		12.1
Unsecured	01/30/15	12/31/18	1.20	%	54.3		—
Unsecured	11/19/13	03/15/19	2.50	%	300.0		300.0
Unsecured	03/04/14	07/30/19	2.50	%	250.0		250.0
Unsecured	10/31/14	03/30/20	2.60	%	250.0		250.0
Unsecured	02/06/15	03/30/20	2.60	%	100.0		—
Unsecured	05/27/11	06/01/21	4.85	%	250.0		250.0
Unsecured	09/20/11	06/01/21	4.85	%	50.0		50.0
Unsecured	06/11/12	06/15/22	4.75	%	250.0		250.0
Unsecured	03/19/13	03/30/23	3.90	%	250.0		250.0
Unsecured	02/06/15	03/30/25	3.25	%	300.0		—
Unsecured	03/04/14	03/15/44	5.20	%	300.0		300.0
Unsecured	02/06/15	03/30/45	4.50	%	250.0		—
Unsecured	04/14/05	04/15/15	5.70	%	—		100.0
Unsecured (2)	02/05/10	05/15/15	4.75	%	—		250.0
Unsecured	12/22/05	12/22/15	5.75	%	—		70.0
Total recourse fixed rate debt					$	3,923.3	$	3,647.8
Recourse Floating Rate Debt
Unsecured (1)	09/02/11	08/31/16	0.94	%	$	5.2	$	8.0
Unsecured	12/21/12	12/21/17	1.64	%	100.0		100.0
Unsecured	01/22/13	12/21/17	1.64	%	10.0		10.0
Unsecured	08/28/14	08/28/24	1.71	%	100.0		100.0

	Date of Issue	Final Maturity	Interest Rate		2015			2014
Unsecured	09/23/15	09/23/25	1.84	%	60.0			—
Unsecured (3)	12/15/10	10/31/15	1.43	%	—			24.8
Unsecured (2)(3)	12/06/11	08/31/16	1.44	%	—			15.3
Unsecured (2)(3)	03/29/06	09/30/16	2.02	%	—			18.9
Unsecured (2)(3)	06/29/07	09/30/16	2.03	%	—			8.5
Unsecured (2)(3)	12/18/07	10/31/16	1.98	%	—			12.7
Unsecured (2)(3)	08/31/12	12/31/19	2.33	%	—			60.5
Unsecured (2)(3)	06/27/13	12/31/20	1.73	%	—			121.0
Unsecured (2)(3)	10/30/13	12/31/20	1.78	%	—			30.2
Unsecured (2)(3)	05/05/14	12/31/20	1.85	%	—			30.2
Total recourse floating rate debt					$	275.2		$	540.1
Nonrecourse Fixed Rate Debt
Secured (1)	09/30/97	09/20/16	6.69	%	$	6.9		$	15.9
Total nonrecourse fixed rate debt					$	6.9		$	15.9
Total debt principal					$	4,205.4		$	4,203.8
Unamortized debt discount and debt issuance costs					(28.5		)	(26.2		)
Debt adjustment for fair value hedges					1.5			0.6
Total Debt					$	4,178.4		$	4,178.2

Maturities of GATX's debt obligation

The following table shows the scheduled principal payments of our debt obligations as of December 31, 2015 (in millions):

2016	$	564.8
2017	412.7
2018	517.9
2019	550.0
2020	350.0
Thereafter	1,810.0
Total debt principal	$	4,205.4

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Fair Value Disclosure (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Assets and liabilities at fair value recurring basis

The following tables show our assets and liabilities that are measured at fair value on a recurring basis (in millions):

Assets	Total December 31 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate derivatives (1)	$	1.8	$	—	$	1.8	$	—
Foreign exchange rate derivatives (1)	10.2		—		10.2		—
Foreign exchange rate derivatives (2)	0.8		—		0.8		—
Available-for-sale equity securities	3.3		3.3		—		—
Liabilities
Interest rate derivatives (1)	1.2		—		1.2		—
Foreign exchange rate derivatives (1)	0.2		—		0.2		—
Foreign exchange rate derivatives (2)	2.4		—		2.4		—

Assets	Total December 31 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate derivatives (1)	$	1.8	$	—	$	1.8	$	—
Foreign exchange rate derivatives (2)	9.7		—		9.7		—
Available-for-sale equity securities	4.4		4.4		—		—
Liabilities
Interest rate derivatives (1)	5.9		—		5.9		—
Foreign exchange rate derivatives (2)	1.6		—		1.6		—

_________

(1) Designated as hedges.

(2) Not designated as hedges.

Non-recurring Level 3 fair value measurements

.

Impact of GATX's Derivative Instrument On Income Statement and Other comprehensive income (loss)

Derivative instruments

Fair Value Hedges

We use interest rate swaps to manage the fixed-to-floating rate mix of our debt obligations by converting the fixed rate debt to floating rate debt. For fair value hedges, we recognize changes in fair value of both the derivative and the hedged item as interest expense. We had eight instruments outstanding with an aggregate notional amount of $550.0 million as of December 31, 2015 that mature from 2017 to 2020 and eight instruments outstanding with an aggregate notional amount of $600.0 million as of December 31, 2014.

Cash Flow Hedges

We use interest rate swaps to convert floating rate debt to fixed rate debt. We use Treasury rate locks to hedge our exposure to interest rate risk on anticipated transactions. We also use currency swaps to hedge our exposure to fluctuations in the exchange rates of the foreign currencies in which we conduct business. We had ten instruments outstanding with an aggregate notional amount of $442.9 million as of December 31, 2015 that mature from 2016 to 2022 and seven instruments outstanding with an aggregate notional amount of $281.5 million as of December 31, 2014. Within the next 12 months, we expect to reclassify $5.8 million ($3.6 million after-tax) of net losses on previously terminated derivatives from accumulated other comprehensive income (loss) to interest expense or operating lease expense, as applicable. We reclassify these amounts when interest and operating lease expense on the related hedged transactions affect earnings.

Non-designated Derivatives

We do not hold derivative financial instruments for purposes other than hedging, although certain of our derivatives are not designated as accounting hedges. We recognize changes in the fair value of these derivatives in other (income) expense immediately.

Some of our derivative instruments contain credit risk provisions that could require us to make immediate payment on net liability positions in the event that we default on certain outstanding debt obligations. The aggregate fair value of our derivative instruments with credit risk related contingent features that are in a liability position as of December 31, 2015 was $1.4 million. We are not required to post any collateral on our derivative instruments and do not expect the credit risk provisions to be triggered.

In the event that a counterparty fails to meet the terms of an interest rate swap agreement or a foreign exchange contract, our exposure is limited to the fair value of the swap, if in our favor. We manage the credit risk of counterparties by transacting with institutions that we consider financially sound and by avoiding concentrations of risk with a single counterparty. We believe that the risk of non-performance by any of our counterparties is remote.

The following table shows the impacts of our derivative instruments on our statement of comprehensive income for the years ended December 31 (in millions):

Derivative Designation	Location of Loss (Gain) Recognized	2015			2014			2013
Fair value hedges (1)	Interest expense	$	(0.8	)	$	4.7		$	4.9
Cash flow hedges	Other comprehensive loss (effective portion)	5.3			5.1			(0.7		)
Cash flow hedges	Interest expense (effective portion reclassified from accumulated other comprehensive loss)	5.6			4.9			5.1
Cash flow hedges	Operating lease expense (effective portion reclassified from accumulated other comprehensive loss)	0.3			3.2			1.5
Cash flow hedges (2)	Other (income) expense (effective portion reclassified from accumulated other comprehensive loss)	(6.9		)	(2.1		)	—
Non-designated (3)	Other (income) expense	(6.1		)	(11.4		)	(0.6		)

_________

(1) The fair value adjustments related to the underlying debt equally offset the amounts recognized in interest expense.

(2) For 2015 and 2014, includes $6.1 million and $2.1 million of gains on foreign currency derivatives which are substantially offset by losses from foreign currency remeasurement adjustments, also recognized in Other (income) expense.

(3) For 2015 and 2014, includes $5.1 million, and $10.4 million of gains on foreign currency derivatives which substantially offset losses from foreign currency remeasurement adjustments on the AAE loan, also recognized in Other (income) expense.

Fair Value Other Financial Instruments

The following table shows the carrying amounts and fair values of our other financial instruments as of December 31 (in millions):

	2015		2015		2014		2014
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Investment funds	$	0.6	$	1.2	$	1.5	$	2.4
Loans	8.8		8.7		97.3		97.4
Liabilities
Recourse fixed rate debt	$	3,915.0	$	3,882.6	$	3,639.9	$	3,775.0
Recourse floating rate debt	275.2		264.6		540.0		540.0
Nonrecourse debt	6.9		7.1		15.9		16.6

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Pension and Other Post-Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2015

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Pension obligations and plan assets and other post-retirement obligations

We use a December 31 measurement date for all of our plans. The following tables show pension obligations, plan assets, and other post-retirement obligations as of December 31 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life
Change in Benefit Obligation
Benefit obligation at beginning of year	$	502.7		$	442.7		$	40.8		$	40.4
Service cost	7.4			5.9			0.2			0.1
Interest cost	19.6			20.7			1.3			1.6
Plan amendments	—			—			(2.5		)	—
Actuarial (gain) loss	(22.6		)	67.0			(3.6		)	2.6
Benefits paid	(36.9		)	(31.2		)	(2.9		)	(3.9		)
Special termination benefits	7.3			—			1.7			—
Effect of foreign exchange rate changes	(2.5		)	(2.4		)	—			—
Benefit obligation at end of year	$	475.0		$	502.7		$	35.0		$	40.8
Change in Fair Value of Plan Assets
Plan assets at beginning of year	456.9			447.8			—			—
Actual return on plan assets	(4.6		)	40.3			—			—
Effect of exchange rate changes	(2.2		)	(2.4		)	—			—
Company contributions	2.9			2.4			2.9			3.9
Benefits paid	(36.9		)	(31.2		)	(2.9		)	(3.9		)
Plan assets at end of year	$	416.1		$	456.9		$	—		$	—
Funded Status at end of year	$	(58.9	)	$	(45.8	)	$	(35.0	)	$	(40.8	)
Amount Recognized
Other Liabilities and Other Assets (net)	$	(58.9	)	$	(45.8	)	$	(35.0	)	$	(40.8	)
Accumulated other comprehensive loss:
Net actuarial loss	163.3			170.9			(0.2		)	3.3
Prior service (credit) cost	(1.1		)	(2.1		)	(2.0		)	0.4
Accumulated other comprehensive loss	162.2			168.8			(2.2		)	3.7
Total recognized	$	103.3		$	123.0		$	(37.2	)	$	(37.1	)
After-tax amount recognized in accumulated other comprehensive loss	$	101.3		$	105.4		$	(1.4	)	$	2.3

The aggregate accumulated benefit obligation for the defined benefit pension plans was $449.4 million at December 31, 2015 and $475.8 million at December 31, 2014.

Pension plans with a projected benefit obligation in excess of plan assets

The following table shows our pension plans that have a projected benefit obligation in excess of plan assets as of December 31 (in millions):

	2015		2014
Projected benefit obligations	$	438.3	$	502.7
Fair value of plan assets	378.6		456.9

Pension plans with an accumulated benefit obligation in excess of plan assets

The following table shows our pension plans that have an accumulated benefit obligation in excess of plan assets as of December 31 (in millions):

	2015		2014
Accumulated benefit obligations	$	412.6	$	170.6
Fair value of plan assets	378.6		140.5

Components of pension and other post retirement benefit costs

The following table shows the components of net periodic cost (benefit) for the year ended December 31 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2013 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life			2013 Retiree Health and Life
Service cost	$	7.4		$	5.9		$	6.7		$	0.2		$	0.1		$	0.2
Interest cost	19.6			20.7			18.4			1.3			1.6			1.6
Expected return on plan assets	(25.8		)	(28.4		)	(27.5		)	—			—			—
Special termination benefits	7.3			—			—			1.7			—			—
Amortization of:
Unrecognized prior service credit	(1.0		)	(1.0		)	(1.0		)	(0.1		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	14.8			11.3			14.9			(0.2		)	(0.1		)	—
Net periodic cost	$	22.3		$	8.5		$	11.5		$	2.9		$	1.5		$	1.7

Schedule of amounts in accumulated other comprehensive loss (gain) to be recognized over next fiscal year

We amortize the unrecognized prior service credit using a straight-line method over the average remaining service period of the employees we expect to receive benefits under the plan. We amortize the unrecognized net actuarial loss (gain), which is subject to certain averaging conventions, over the average remaining service period of active employees.

The following table shows the amounts we expect to recognize as components of net periodic cost in 2016 from amounts recorded in accumulated comprehensive loss (gain) as of December 31, 2015 (in millions):

	2016
	Pension Benefits			Retiree Health and Life
Unrecognized net actuarial loss (gain)	$	10.4		$	(0.1	)
Unrecognized prior service credit	(1.0		)	(0.2		)

Expected long term return on assets and to measure the periodic cost

We use the following assumptions to measure the benefit obligation, compute the expected long-term return on assets, and measure the periodic cost for our defined benefit pension plans and other post-retirement benefit plans for the years ended December 31:

	2015		2014
Domestic defined benefit pension plans
Benefit Obligation at December 31:
Discount rate — salaried funded and unfunded plans	4.46	%	4.05	%
Discount rate — hourly funded plan	4.51	%	4.10	%
Rate of compensation increases — salaried funded and unfunded plans	2.50	%	2.50	%
Rate of compensation increases — hourly funded plans	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate — salaried funded and unfunded plans	4.05	%	4.80	%
Discount rate — hourly funded plan	4.10	%	4.90	%
Expected return on plan assets — salaried funded plan	6.50	%	7.60	%
Expected return on plan assets — hourly funded plan	6.35	%	6.90	%
Rate of compensation increases — salaried funded and unfunded plans	2.50	%	3.00	%
Rate of compensation increases — hourly funded plan	N/A		N/A
Foreign defined benefit pension plan
Benefit Obligation at December 31:
Discount rate	3.60	%	3.20	%
Rate of pension-in-payment increases	3.00	%	2.90	%
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate	3.20	%	4.40	%
Expected return on plan assets	4.80	%	5.40	%
Rate of pension-in-payment increases	2.90	%	3.40	%
Other post-retirement benefit plans
Benefit Obligation at December 31:
Discount rate - salaried health	3.96	%	3.65	%
Discount rate - hourly health	4.11	%	3.85	%
Discount rate - salaried life insurance	4.40	%	4.00	%
Discount rate - hourly life insurance	4.04	%	3.70	%
Rate of compensation increases	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate - salaried health	3.65	%	4.20	%
Discount rate - hourly health	3.85	%	4.60	%
Discount rate - salaried life insurance	4.00	%	4.75	%
Discount rate - hourly life insurance	3.70	%	4.40	%
Rate of compensation increases	N/A		N/A

Review of historical returns

We calculate the present value of expected future pension and post-retirement cash flows as of the measurement date using a discount rate. We base the discount rate on yields for high-quality, long-term bonds with durations similar to that of our projected benefit obligation. We base the expected return on our plan assets on current and expected asset allocations, as well as historical and expected returns on various categories of plan assets. We routinely review our historical returns along with current market conditions to ensure our expected return assumption is reasonable and appropriate.

	2015		2014
Assumed Health Care Cost Trend Rates at December 31
Health care cost trend assumed for next year
Medical claims - pre age 65	7.00	%	7.50	%
Medical claims - post age 65	6.00	%	7.50	%
Prescription drugs claims - pre age 65	10.00	%	7.00	%
Prescription drugs claims - post age 65	10.50	%	7.00	%
Rate to which the cost trend is expected to decline (the ultimate trend rate)
Medical claims	4.50	%	5.00	%
Prescription drugs claims	4.50	%	5.00	%
Year that rate reaches the ultimate trend rate
Medical claims	2024		2023
Prescription drugs claims	2024		2023

Effect on the other post-retirement benefit cost and obligation

The health care cost trend, which is based on projected growth rates for medical and prescription drug claims, has a significant effect on our other post-retirement benefit costs and obligations. The following table shows the effects of a one percentage point change in the health care cost trend rate on service and interest costs for the year ended December 31, 2015 and the post-retirement benefit obligation as of December 31, 2015 (in millions) :

	One Percentage Point Increase		One Percentage Point Decrease
Effect on total of service and interest cost	$	0.1	$	(0.1	)
Effect on post-retirement benefit obligation	1.5		(1.3		)

Pension plan assets fair value

The following tables set forth the fair value of our pension plan assets as of December 31 (in millions):

	Total December 31 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Short-term investment funds	$	1.6	$	1.6	$	—	$	—
Common stock							—
US equities	11.4		11.4		—		—
International equities	1.2		1.2		—		—
Common stock collective funds	190.4		—		190.4		—
Fixed income collective trust funds	160.4		—		160.4		—
Real estate collective trust funds	20.2		—		20.2		—
Loan fund	30.9		—		30.9		—
Total	$	416.1	$	14.2	$	401.9	$	—

	Total December 31 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Short-term investment funds	$	0.9	$	0.9	$	—	$	—
Common stock							—
US equities	13.3		13.3		—		—
International equities	1.6		1.6		—		—
Common stock collective funds	215.2		—		215.2		—
Fixed income collective trust funds	177.8		—		177.8		—
Real estate collective trust funds	17.9		—		17.9		—
Loan fund	30.2		—		30.2		—
Total	$	456.9	$	15.8	$	441.1	$	—

Schedule of Expected Benefit Payments

The following table shows benefit payments, which reflect expected future service, as appropriate, we expect the plan to pay (in millions):

	Funded Plans		Unfunded Plans		Retiree Health and Life
2016	$	42.9	$	2.5	$	3.9
2017	27.9		2.6		3.8
2018	28.1		2.6		3.3
2019	28.2		3.2		2.8
2020	28.6		3.5		2.6
Years 2021-2025	144.5		18.3		11.6
	$	300.2	$	32.7	$	28.0

Contributions to Multiemployer Benefit Plans

The following table shows our contributions to multiemployer benefit plans for the years indicated (in millions):

Multiemployer Plans	EIN and Pension Plan Number	Pension Protection Act Zone Status	GATX Contributions						Collective Bargaining Agreement Expiration Date
			2015		2014		2013
American Maritime Officers Pension Plan (1)	13-1969709-001	Endangered-Yellow	$	1.4	$	1.5	$	1.4	January 15, 2017
Other multiemployer post-retirement plans			6.8		7.0		6.7
Total			$	8.2	$	8.5	$	8.1

__________________

(1)Our contributions represented more than 5% of the total contributions to the plan during each year and no surcharge was imposed for any year. The actuary for the American Maritime Officers Pension Plan certified that the plan is in endangered status (i.e. “yellow zone” as defined by the Pension Protection Act of 2006) for the plan year beginning October 1, 2013, because it has funding or liquidity problems, or both. A rehabilitation plan, as defined by the Employee Retirement Security Act of 1974, was instituted under which certain adjustable benefits were reduced or eliminated, and we are required to contribute at a negotiated rate per day worked by each employee.

Foreign Funded Pension Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Weighted-average asset allocations of domestic funded pension plans

The following table shows the weighted-average asset allocations of our foreign funded pension plan at December 31, 2015 and 2014, and current target asset allocation for 2016, by asset category:

			Plan Assets at December 31
	Target		2015		2014
Asset Category
Equity securities	36.8	%	36.8	%	37.7	%
Debt securities	63.2	%	63.2	%	62.3	%
	100.0	%	100.0	%	100.0	%

Domestic defined benefit pension plans [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Weighted-average asset allocations of domestic funded pension plans

Our investment policies require that asset allocations of domestic and foreign funded pension plans be maintained at certain targets. The following table shows our weighted-average asset allocations of our domestic funded pension plans at December 31, 2015 and 2014, and current target asset allocation for 2016, by asset category:

			Plan Assets at December 31
	Target		2015		2014
Asset Category
Equity securities	52.0	%	50.2	%	51.7	%
Debt securities	44.0	%	44.4	%	43.9	%
Real estate	4.0	%	5.4	%	4.3	%
Cash	—	%	—	%	0.1	%
	100.0	%	100.0	%	100.0	%

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Share Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Weighted Average Fair Value and Assumptions

The following table shows the weighted average fair value for our stock appreciation rights and the assumptions we used to estimate fair value:

	2015			2014			2013
Weighted average estimated fair value	$	18.16		$	18.12		$	18.89
Quarterly dividend rate	$	0.38		$	0.33		$	0.30
Expected term of stock appreciation rights, in years	4.7			4.4			4.7
Risk-free interest rate	1.2		%	1.3		%	0.7		%
Dividend yield	2.6		%	2.3		%	2.6		%
Expected stock price volatility	29.2		%	30.3		%	42.4		%
Present value of dividends	$	6.90		$	5.76		$	5.60

Data With Respect to Stock Options SARs Activity

The following table shows information about outstanding stock options and stock appreciation rights for the year ended December 31, 2015:

	Number of Stock Options and Stock Appreciation Rights (in thousands)	Weighted Average Exercise Price
Outstanding at beginning of the year	1,490	$	39.65
Granted	342	56.91
Exercised	(231)	25.96
Forfeited/Cancelled	(26)	53.29
Expired	(1)	50.02
Outstanding at end of the year	1,574	45.18
Vested and exercisable at end of the year	976	38.68

Schedule of Share-Based Compensation, Aggregate Intrinsic Value and Weighted Average Remaining Contractual Term

The following table shows the aggregate intrinsic value of stock options and stock appreciation rights exercised in 2015, 2014, and 2013, and the weighted average remaining contractual term and aggregate intrinsic value of stock appreciation rights outstanding and vested as of December 31, 2015:

Stock Options and Stock Appreciation Rights	Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (in millions)
Exercised in 2013		$	6.9
Exercised in 2014		11.8
Exercised in 2015		6.2
Outstanding at December 31, 2015 (a)	3.7	6.3
Vested and exercisable at December 31, 2015	2.7	6.3

__________________

(a) As of December 31, 2015, there are no remaining stock options outstanding.

Schedule of Share-Based Compensation, Restricted Stock Units and Performance Shares Award Activity

The following table shows information about restricted stock units and performance shares for the year ended December 31, 2015:

	Number of Share Units Outstanding		Weighted Average Grant-Date Fair Value
Restricted Stock Units:
Nonvested at beginning of the year	177,210		$	48.90
Granted	68,710		56.73
Vested	(63,748	)	44.92
Forfeited	(10,232	)	54.33
Nonvested at end of the year	171,940		53.18
Performance Shares:
Nonvested at beginning of the year	175,069		$	48.95
Granted	61,740		55.54
Net (decrease) due to estimated performance	(22,578	)	54.39
Vested	(92,991	)	45.01
Nonvested at end of the year	121,240		54.32

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Components of Deferred tax Assets and Liabilities

significant components of our deferred tax liabilities and assets as of December 31 (in millions):

	2015			2014
Deferred Tax Liabilities
Book/tax basis difference due to depreciation	$	1,058.1		$	963.8
Investments in affiliated companies	72.9			99.7
Lease accounting	7.3			10.5
Other	—			0.1
Total deferred tax liabilities	1,138.3			1,074.1
Deferred Tax Assets
Federal net operating loss	13.2			41.8
Alternative minimum tax credit	14.8			9.2
Foreign tax credit	5.8			3.6
Valuation allowance on foreign tax credit	(5.8		)	(3.6		)
State net operating loss	27.7			28.7
Valuation allowance on state net operating loss	(12.6		)	(11.3		)
Foreign net operating loss	3.6			5.8
Valuation allowance on foreign net operating loss	(0.3		)	(0.2		)
Accruals not currently deductible for tax purposes	22.2			18.7
Allowance for losses	3.2			1.7
Pension and post-retirement benefits	35.8			32.6
Other	12.4			9.8
Total deferred tax assets	120.0			136.8
Net deferred tax liabilities	$	1,018.3		$	937.3

Gross liability for unrecognized tax benefits

The following table shows a reconciliation of the beginning and ending amount of our gross liability for unrecognized tax benefits (in millions)

	2015		2014
Beginning balance	$	5.6	$	5.7
Reductions due to settlement of tax audit issues	—		(0.4		)
Additions to tax positions for prior years	0.1		0.3
Ending balance	$	5.7	$	5.6

Income before income taxes

The following table shows the components of income before income taxes, excluding affiliates, for the years ending December 31 (in millions):

	2015		2014		2013
Domestic	$	174.7	$	137.9	$	66.0
Foreign	95.6		93.3		93.0
	$	270.3	$	231.2	$	159.0

Consolidated federal income taxes

The following table shows income taxes, excluding domestic and foreign joint ventures, for the years ending December 31 (in millions):

	2015			2014		2013
Current
Domestic:
Federal	$	5.6		$	0.7	$	1.4
State and local	(0.2		)	0.6		—
	5.4			1.3		1.4
Foreign	15.3			13.0		10.5
	20.7			14.3		11.9
Deferred
Domestic:
Federal	44.7			45.0		36.6
State and local	33.7			5.6		5.3
	78.4			50.6		41.9
Foreign	11.8			10.8		11.7
	90.2			61.4		53.6
Income taxes	$	110.9		$	75.7	$	65.5

Summary of reasons for difference between GATX's effective income tax rate and federal statutory income tax

The following table shows the differences between our effective income tax rate and the federal statutory income tax rate for the years ending December 31 (in millions):

	2015			2014			2013
Income taxes at federal statutory rate	$	94.6		$	80.9		$	55.6
Adjust for effect of:
GATX income taxes on sale of AAE	—			—			23.2
Foreign tax credits	—			—			(3.9		)
Foreign earnings taxed at lower rates	(6.2		)	(8.5		)	(10.3		)
Tax effect of foreign dividends	0.9			—			—
Corporate owned life insurance	(0.9		)	(0.6		)	(0.5		)
State income taxes	7.6			4.1			1.5
State deferred tax rate change impact	14.1			—			—
Other	0.8			(0.2		)	(0.1		)
Income taxes	$	110.9		$	75.7		$	65.5
Effective income tax rate	41.0		%	32.7		%	41.2		%

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Commercial Commitments (Tables)

12 Months Ended

Dec. 31, 2014

Guarantees [Abstract]

Commercial Commitments

The following table shows our commercial commitments as of December 31 (in millions):

	2015		2014
Lease payment guarantees	$	22.1	$	28.5
Standby letters of credit and performance bonds	8.9		9.1
Total commercial commitments (1)	$	31.0	$	37.6

__________________

(1) The carrying value of liabilities on the balance sheet for commercial commitments was $4.1 million at December 31, 2015 and $5.1 million at December 31, 2014. The expirations of these commitments range from 2017 to 2023. We are not aware of any event that would require us to satisfy any of our commitments.

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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Computation of basic and diluted net income per common share

The following table shows the computation of our basic and diluted net income per common share for the years ending December 31 (in millions, except per share amounts):

	2015		2014		2013
Numerator:
Net income	$	205.3	$	205.0	$	169.3
Denominator:
Weighted average shares outstanding - basic	43.1		45.0		46.4
Effect of dilutive securities:
Equity compensation plans	0.7		0.8		0.7
Weighted average shares outstanding - diluted	43.8		45.8		47.1
Basic earnings per share	$	4.76	$	4.55	$	3.64
Diluted earnings per share	$	4.69	$	4.48	$	3.59

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Allowance for Losses (Tables)

12 Months Ended

Dec. 31, 2015

Receivables [Abstract]

Changes in the allowance for possible losses

The following table shows changes in the allowance for losses at December 31 (in millions):

	2015			2014
Beginning balance	$	5.7		$	5.2
Provision for losses	6.6			0.8
Charges to allowance	(1.9		)	(0.3		)
Recoveries and other, including foreign exchange adjustments	(0.1		)	—
Ending balance	$	10.3		$	5.7

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Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2015

Stockholders' Equity Note [Abstract]

Common stock reserved for conversion and incentive plans

The following shares of common stock were reserved as of December 31, 2015 (in millions):

GATX Corporation 2004 Equity Incentive Compensation Plan	2.3
GATX Corporation 2012 Incentive Award Plan	3.5
	5.8

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Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Accumulated other comprehensive income (loss)

The following table shows the change in components for accumulated other comprehensive loss (in millions):

	Foreign Currency Translation Gain (Loss)			Unrealized Gain (Loss) on Securities			Unrealized Loss on Derivative Instruments			Post-Retirement Benefit Plans			Total
Balance at December 31, 2012	$	31.4		$	(0.4	)	$	(44.5	)	$	(131.1	)	$	(144.6	)
Change in component	25.8			1.4			22.3			71.0			120.5
Reclassification adjustments into earnings	—			—			6.6			13.8			20.4
Income tax effect	—			(0.6		)	(6.5		)	(31.9		)	(39.0		)
Balance at December 31, 2013	57.2			0.4			(22.1		)	(78.2		)	(42.7		)
Change in component	(79.1		)	(0.2		)	0.3			(57.3		)	(136.3		)
Reclassification adjustments into earnings	—			—			6.0			10.1			16.1
Income tax effect	—			0.1			(3.3		)	17.7			14.5
Balance at December 31, 2014	(21.9		)	0.3			(19.1		)	(107.7		)	(148.4		)
Change in component	(55.8		)	(1.0		)	1.6			(0.9		)	(56.1		)
Reclassification adjustments into earnings	—			—			(1.0		)	13.5			12.5
Income tax effect	—			0.4			(2.4		)	(4.8		)	(6.8		)
Balance at December 31, 2015	$	(77.7	)	$	(0.3	)	$	(20.9	)	$	(99.9	)	$	(198.8	)

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Foreign Operations (Tables)

12 Months Ended

Dec. 31, 2015

Concentration Risks, Types, No Concentration Percentage [Abstract]

Foreign operations data

The following table shows our domestic and foreign revenues and identifiable assets for the years ended or as of December 31 (in millions):

	2015		2014		2013
Revenues
Foreign	$	329.4	$	346.2	$	332.1
United States	1,120.5		1,104.8		988.9
	$	1,449.9	$	1,451.0	$	1,321.0
Identifiable Assets
Foreign	$	1,992.3	$	2,133.3	$	2,199.2
United States	4,901.9		4,786.6		4,336.3
	$	6,894.2	$	6,919.9	$	6,535.5

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Financial Data of Business Segments (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Segment data

The following tables show certain segment data for the years ended December 31, 2015, 2014, and 2013 (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2015 Profitability
Revenues
Lease revenue	$	930.9		$	172.9		$	4.1		$	22.2		$	—		$	1,130.1
Marine operating revenue	—			—			166.1			68.9			—			235.0
Other revenue	75.9			7.5			—			1.4			—			84.8
Total Revenues	1,006.8			180.4			170.2			92.5			—			1,449.9
Expenses
Maintenance expense	264.2			39.6			22.3			—			—			326.1
Marine operating expense	—			—			107.2			48.7			—			155.9
Depreciation expense	215.1			43.7			14.3			17.4			—			290.5
Operating lease expense	82.2			—			5.2			—			(0.2		)	87.2
Other operating expense	26.2			5.1			—			7.1			—			38.4
Total Expenses	587.7			88.4			149.0			73.2			(0.2		)	898.1
Other Income (Expense)
Net gain (loss) on asset dispositions	67.2			6.8			(0.1		)	5.3			—			79.2
Interest expense, net	(102.1		)	(22.4		)	(5.3		)	(20.0		)	(5.3		)	(155.1		)
Other expense	(5.2		)	(6.0		)	(0.7		)	—			(1.3		)	(13.2		)
Share of affiliates' earnings (pretax) (1)	0.5			(0.3		)	—			45.2			—			45.4
Segment profit (loss)	$	379.5		$	70.1		$	15.1		$	49.8		$	(6.4	)	508.1
Selling, general and administrative expense																192.4
Income taxes (including $0.5 tax benefits related to affiliates' earnings)																110.4
Net income																$	205.3
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	66.6			—			—			23.7			—			$	90.3
Residual sharing income	0.8			—			—			12.6			—			13.4
Non-remarketing disposition gains (2)	2.3			7.2			(0.1		)	—			—			9.4
Asset impairment	(2.5		)	(0.4		)	—			(31.0		)	—			(33.9		)
	$	67.2		$	6.8		$	(0.1	)	$	5.3		$	—		$	79.2
Capital Expenditures
Portfolio investments and capital additions	$	524.5		$	148.0		$	20.3		$	18.4		$	3.5		$	714.7
Selected Balance Sheet Data
Investments in affiliated companies	$	12.0		$	1.4		$	—		$	335.1		$	—		$	348.5
Identifiable assets	$	4,629.1		$	1,117.6		$	284.7		$	636.5		$	226.3		$	6,894.2

__________

(1) Includes a $19.0 million impairment loss in the Portfolio Management segment.

(2) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2014 Profitability
Revenues
Lease revenue	$	864.1		$	188.6		$	4.2		$	29.7		$	—		$	1,086.6
Marine operating revenue	—			—			223.0			63.3			—			286.3
Other revenue	63.4			10.3			—			4.4			—			78.1
Total Revenues	927.5			198.9			227.2			97.4			—			1,451.0
Expenses
Maintenance expense	265.5			45.9			25.6			—			—			337.0
Marine operating expense	—			—			149.2			48.6			—			197.8
Depreciation expense	190.0			47.1			13.6			22.8			—			273.5
Operating lease expense	103.7			—			5.2			—			(0.2		)	108.7
Other operating expense	21.9			5.1			—			1.9			—			28.9
Total Expenses	581.1			98.1			193.6			73.3			(0.2		)	945.9
Other Income (Expense)
Net gain (loss) on asset dispositions	72.3			6.0			(0.5		)	9.4			—			87.2
Interest expense, net	(98.4		)	(24.7		)	(5.6		)	(24.3		)	(5.4		)	(158.4		)
Other expense	(7.2		)	(3.1		)	(0.2		)	(1.2		)	(1.8		)	(13.5		)
Share of affiliates' earnings (pretax)	7.9			(0.3		)	—			60.2			—			67.8
Segment profit (loss)	$	321.0		$	78.7		$	27.3		$	68.2		$	(7.0	)	488.2
Selling, general and administrative expense																189.2
Income taxes (including $18.3 related to affiliates' earnings)																94.0
Net income																$	205.0
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	57.4		$	0.6		$	—		$	5.1		$	—		$	63.1
Residual sharing income	5.2			—			—			4.2			—			9.4
Non-remarketing disposition gains (1)	10.4			5.7			(0.1		)	—			—			16.0
Asset impairment	(0.7		)	(0.3		)	(0.4		)	0.1			—			(1.3		)
	$	72.3		$	6.0		$	(0.5	)	$	9.4		$	—		$	87.2
Capital Expenditures
Portfolio investments and capital additions	$	810.6		$	163.6		$	18.4		$	32.3		$	5.6		$	1,030.5
Selected Balance Sheet Data
Investments in affiliated companies	$	17.2		$	1.8		$	—		$	338.7		$	—		$	357.7
Identifiable assets	$	4,358.2		$	1,228.8		$	286.7		$	813.3		$	232.9		$	6,919.9

__________

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2013 Profitability
Revenues
Lease revenue	$	758.9		$	180.2		$	4.2		$	31.9		$	—		$	975.2
Marine operating revenue	—			—			223.5			51.6			—			275.1
Other revenue	58.2			8.8			—			3.7			—			70.7
Total Revenues	817.1			189.0			227.7			87.2			—			1,321.0
Expenses
Maintenance expense	228.2			42.9			22.9			—			—			294.0
Marine operating expense	—			—			151.3			38.5			—			189.8
Depreciation expense	176.7			43.2			12.1			23.0			—			255.0
Operating lease expense	124.4			—			5.2			—			(0.2		)	129.4
Other operating expense	18.4			5.3			—			2.4			—			26.1
Total Expenses	547.7			91.4			191.5			63.9			(0.2		)	894.3
Other Income (Expense)
Net gain (loss) on asset dispositions	67.7			3.7			(1.3		)	15.5			—			85.6
Interest expense, net	(106.0		)	(23.9		)	(6.2		)	(26.7		)	(3.8		)	(166.6		)
Other expense (income)	(9.8		)	(1.1		)	0.2			1.4			0.9			(8.4		)
Share of affiliates' earnings (pretax)	10.3			21.1			—			60.9			—			92.3
Segment profit (loss)	$	231.6		$	97.4		$	28.9		$	74.4		$	(2.7	)	429.6
Selling, general and administrative expense																178.3
Income taxes (including $16.5 related to affiliates' earnings)																82.0
Net income																$	169.3
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	51.1		$	0.3		$	—		$	8.6		$	—		$	60.0
Residual sharing income	3.4			—			—			7.4			—			10.8
Non-remarketing disposition gains (1)	14.5			6.2			—			—			—			20.7
Asset impairment	(1.3		)	(2.8		)	(1.3		)	(0.5		)	—			(5.9		)
	$	67.7		$	3.7		$	(1.3	)	$	15.5		$	—		$	85.6
Capital Expenditures
Portfolio investments and capital additions	$	502.4		$	168.5		$	11.2		$	170.5		$	7.0		$	859.6
Selected Balance Sheet Data
Investments in affiliated companies	$	31.4		$	2.0		$	—		$	320.9		$	—		$	354.3
Identifiable assets	$	3,710.3		$	1,296.2		$	271.0		$	856.9		$	401.1		$	6,535.5

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Selected Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (unaudited)

	First  Quarter		Second Quarter		Third Quarter (2)		Fourth Quarter (3)		Total
	In millions, except per share data
2015
Total revenues	$	319.7	$	365.3	$	386.2	$	378.7	$	1,449.9
Net income	$	62.2	$	45.4	$	39.5	$	58.2	$	205.3
Per Share Data (1)
Basic	$	1.41	$	1.04	$	0.92	$	1.38	$	4.76
Diluted	$	1.39	$	1.03	$	0.91	$	1.37	$	4.69
2014
Total revenues	$	286.6	$	365.8	$	397.2	$	401.4	$	1,451.0
Net income	$	42.1	$	53.1	$	51.3	$	58.5	$	205.0
Per Share Data (1)
Basic	$	0.92	$	1.17	$	1.16	$	1.32	$	4.55
Diluted	$	0.90	$	1.15	$	1.14	$	1.30	$	4.48

___________________

(1) Quarterly earnings per share may not be additive, as per share amounts are computed independently for each quarter and the full year is based on the respective weighted average common shares and common stock equivalents outstanding.

(2) In the third quarter of 2015, net income included $31.1 million of net impairment losses and $4.5 million of net disposition gains, both related to the decision to exit the majority of the marine investments within the Portfolio Management segment.

(3) In the fourth quarter of 2015, net income included $9.0 million of net disposition gains related to the decision to exit the majority of the marine investments within the Portfolio Management segment. In addition, we recorded $14.1 million of expense attributable to an increase in our effective state income tax rate, $7.7 million of benefit resulting from a reduction in the statutory income tax rate in the UK, and $5.6 million of net expenses associated with an early retirement program offered to certain employees.

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Description of Business (Details)	12 Months Ended
	Dec. 31, 2015 Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments	4

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Accounting Changes Accounting Changes (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation, Nonproduction		$ 290.5	$ 273.5	$ 255.0
Unamortized Debt Issuance Expense	$ 17.6	$ 18.8	17.6
Service Life [Member]
Property, Plant and Equipment [Line Items]
Depreciation, Nonproduction	$ 21.9
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income			$ 14.0
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Diluted Earnings Per Share			$ 0.31
Railcars [Member]
Property, Plant and Equipment [Line Items]
Average Increase (Decrease) in Estimated Railcar Useful Life			2 years 2 months 12 days
Railcars [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		20 years	27 years	30 years
Railcars [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		42 years	42 years	38 years

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Significant Accounting Policies (Details 1)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Minimum [Member] | Railcars [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	20 years	27 years	30 years
Minimum [Member] | Locomotives [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	10 years
Minimum [Member] | Buildings [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	40 years
Minimum [Member] | Leasehold Improvements [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	5 years
Minimum [Member] | Marine vessels [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	30 years
Minimum [Member] | Industrial Equipment [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	5 years
Maximum [Member] | Railcars [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	42 years	42 years	38 years
Maximum [Member] | Locomotives [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	20 years
Maximum [Member] | Buildings [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	50 years
Maximum [Member] | Leasehold Improvements [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	15 years
Maximum [Member] | Marine vessels [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	65 years
Maximum [Member] | Industrial Equipment [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	30 years

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Significant Accounting Policies (Gain on Asset Dispositions) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Disposition gains	$ 90.3	$ 63.1	$ 60.0
Residual sharing income	13.4	9.4	10.8
Non-remarketing disposition gains	9.4	16.0	20.7
Asset impairments	33.9	1.3	5.9
Net Gain on Asset Dispositions	$ 79.2	$ 87.2	$ 85.6

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Significant Accounting Policies (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Entity	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Accounting Policies [Abstract]
Wholly-owned bankruptcy remote special-purpose corporations | Entity	2
Interest expense net of interest income on bank deposits | $	$ 1.1	$ 0.9	$ 1.2

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Significant Accounting Policies Foreign Currency (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign Currency [Abstract]
Foreign Currency Transaction Gain (Loss), before Tax	$ 1.1	$ (3.4)	$ 2.1

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Supplemental Cash Flow and Noncash Investing Transactions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Car		Dec. 31, 2014 USD ($) Car	Dec. 31, 2013 USD ($) Car Vessel
Noncash or Part Noncash Divestitures [Line Items]
Capital Lease Obligations Incurred	$ 17.8
Capital Leases, Future Minimum Payments Due, Next Twelve Months			$ 0.0	$ 0.0
Number of railcars received | Car	157		62	640
Capital Lease Obligations Incurred	14.8
Number of vessels received | Vessel				5
Noncash or Part Noncash Acquisition, Value of Assets Acquired	$ 0.0		$ 1.1	$ 174.7
Supplemental Cash Flow Information
Interest paid	144.4	[1]	142.6	148.7
Income taxes paid (refunded), net	13.3		18.7	7.4
Portfolio proceeds	$ 482.2		$ 264.0	$ 385.3

[1] (1) Interest paid consisted of interest on debt obligations, interest rate swaps (net of interest received), and capital leases. The interest expense we capitalized as part of the cost of construction of major assets was immaterial for all periods presented.

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Supplemental Cash Flow and Noncash Investing Transactions (Details Textual) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015 EUR (€) Car	Dec. 31, 2015 USD ($) Car	Dec. 31, 2014 USD ($) Car	Dec. 31, 2013 EUR (€) Car	Dec. 31, 2013 USD ($) Car
Noncash or Part Noncash Divestitures [Line Items]
Portfolio proceeds		$ 482.2	$ 264.0		$ 385.3
Supplemental Cash Flow and Noncash Investing and Financing Transactions (Textual) [Abstract]
Aggregate fair value of liquidating distributions			$ 1.1		$ 22.9
Number of railcars received | Car	157	157	62	640	640
Singco/Somagas [Member]
Supplemental Cash Flow and Noncash Investing and Financing Transactions (Textual) [Abstract]
Aggregate fair value of liquidating distributions					$ 151.8
Aae Cargo Ag [Member]
Noncash or Part Noncash Divestitures [Line Items]
Portfolio proceeds		$ 0.0	$ 0.0		91.1
Aae Cargo Ag [Member]
Noncash or Part Noncash Divestitures [Line Items]
Portfolio proceeds	€ 68.2	$ 77.2		€ 67.5	$ 91.1

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Leases (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Car	Dec. 31, 2014 USD ($) Car	Dec. 31, 2013 Car
Subsequent Event [Line Items]
Number of railcars received | Car	157	62	640
Direct Financing [Abstract]
Total minimum lease payments receivable, Direct Financing	$ 199.6	$ 204.8
Estimated non-guaranteed residual value of leased assets, Direct Financing	58.7	68.5
Unearned income, Direct Financing	(90.7)	(98.6)
Finance leases, Direct Financing	$ 167.6	$ 174.7

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Leases (Details 1) $ in Millions	Dec. 31, 2015 USD ($)
Minimum Future Receipts
2016, Finance Leases	$ 28.3
2017, Finance Leases	25.9
2018, Finance Leases	23.9
2019, Finance Leases	22.6
2020, Finance Leases	21.1
Years thereafter, Finance Leases	77.8
Total, Finance Leases	199.6
2016, Operating Leases	970.3	[1]
2017, Operating Leases	815.1	[1]
2018, Operating Leases	684.3	[1]
2019, Operating Leases	568.1	[1]
2020, Operating Leases	442.6	[1]
Years thereafter, Operating Leases	912.2	[1]
Total future receipts from leases	4,392.6	[1]
2016, Total	998.6
2017, Total	841.0
2018, Total	708.2
2019, Total	590.7
2020, Total	463.7
Years thereafter, Total	990.0
Total	$ 4,592.2

[1] (1) The future contractual receipts due under our full-service operating leases include executory costs such as maintenance, car taxes, and insurance.

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Leases (Details 2) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets that are financed with capital lease obligations
Less: allowance for depreciation	$ (79.8)	$ (75.3)
Capital leased assets, net	22.5	7.8
Railcars [Member]
Assets that are financed with capital lease obligations
Capital leased assets, gross	17.8	0.0
Marine vessels [Member]
Assets that are financed with capital lease obligations
Capital leased assets, gross	$ 84.5	$ 83.1

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Leases (Details 3) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Capital Leases
2016, Capital Leases	$ 4.3
2017, Capital Leases	2.8
2018, Capital Leases	1.6
2019, Capital Leases	11.5
2020, Capital Leases	0.0
Years thereafter, Capital Leases	0.0
Capital Leases, Future Minimum Payments Due, Total	20.2
Less: amounts representing interest	(1.8)
Present value of future minimum capital lease payments	18.4	$ 6.3
Recourse Operating Leases [Member]
Operating Leases
2016, Operating Lease	85.1
2017, Operating Lease	91.7
2018, Operating Lease	83.0
2019, Operating Lease	79.8
2020, Operating Lease	72.7
Years thereafter, Operating Leases	244.0
Total, Operating Leases	$ 656.3

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Leases (Details Textual)
$ in Millions

12 Months Ended

Dec. 31, 2015

USD ($)

Dec. 31, 2014

USD ($)

Car

Dec. 31, 2013

USD ($)

Operating Leased Assets [Line Items]

Schedule of Capital Leased Assets [Table Text Block]

The following table shows assets we financed with capital lease obligations as of December 31 (in millions):

	2015			2014
Railcars	$	17.8		$	—
Marine vessels	84.5			83.1
Less: allowance for depreciation	(79.8		)	(75.3		)
	$	22.5		$	7.8

Operating Leases, Rent Expense

$ 91.2

$ 112.9

$ 134.0

Leases (Textual) [Abstract]

Rental income from usage rents

91.2

$ 83.9

$ 21.3

Number of boxcars acquired | Car

18,500

Deferred initial direct costs of direct financial leases

$ 0.1

$ 0.3

Railroad Transportation Equipment [Member]

Operating Leased Assets [Line Items]

Schedule of Capital Leased Assets [Table Text Block]

19,000

Marine vessels [Member]

Operating Leased Assets [Line Items]

Schedule of Capital Leased Assets [Table Text Block]

1

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Investments in Affiliated Companies (Significant Investments in Affiliates) (Details 1) € in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($) Joint_Venture	Dec. 31, 2014 USD ($)	Dec. 31, 2013 EUR (€) Vessel	Dec. 31, 2013 USD ($) Vessel
Investments in and Advances to Affiliates [Line Items]
Advances to Affiliate			$ 11.2	$ 16.3
Asset Impairment Charges			33.9	1.3		$ 5.9
Equity Method Investment, Net Sales Proceeds			24.7	19.4		55.6
Portfolio proceeds and other			482.2	264.0		$ 385.3
Number of vessels received | Vessel					5	5
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies			348.5	357.7		$ 354.3
Fair Value of Assets Acquired				1.1		22.9
Cardinal Marine [Domain]
Investments in and Advances to Affiliates [Line Items]
Asset Impairment Charges			$ (19.0)
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
GATX's Percentage Ownership			100.00%
Rolls Royce Partners Finance [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	[1]		$ 335.1
GATX's Percentage Ownership	[1]		50.00%
Adler Funding Llc [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies			$ 11.7
GATX's Percentage Ownership			12.50%
Other Affiliates [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies			$ 1.7
RRPF Joint Ventures [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Number of joint venture investments | Joint_Venture			15
Singco/Somagas [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Fair Value of Assets Acquired						151.8
Intermodal Investment Fund V and VII [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Net Sales Proceeds				18.3
Aae Cargo Ag [Member]
Investments in and Advances to Affiliates [Line Items]
Portfolio proceeds and other		€ 68.2	$ 77.2		€ 67.5	$ 91.1
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
GATX's Percentage Ownership						37.50%
Portfolio Management [Member]
Investments in and Advances to Affiliates [Line Items]
Asset Impairment Charges			31.0	(0.1)		$ 0.5
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies			335.1	$ 338.7		$ 320.9
Portfolio Management [Member] | Cardinal Marine [Domain]
Investments in and Advances to Affiliates [Line Items]
Asset Impairment Charges			(19.0)
Portfolio Management [Member] | Cardinal Marine [Domain]
Investments in and Advances to Affiliates [Line Items]
Portfolio proceeds and other			$ 24.7

[1] (1) Combined investment balances of fifteen separate joint ventures (collectively, the "RRPF affiliates")

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Loans (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 EUR (€)	Dec. 31, 2013 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Portfolio proceeds and other		$ 482.2	$ 264.0		$ 385.3
2014		2.0
2015		2.0
2016		4.2
2017		0.1
2018		0.1
Thereafter		0.4
Loans receivables, outstanding		8.8	$ 97.3
Aae Cargo Ag [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Portfolio proceeds and other	€ 68.2	77.2		€ 67.5	$ 91.1
Portfolio Proceeds, Principal	67.5	76.4
Portfolio Proceeds, Interest	€ 0.7	$ 0.8

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Investments in Affiliated Companies (Share of Affiliate Earnings) (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	$ 45.4	$ 67.8	$ 92.3
Provision for Income Taxes, Equity Method Investment	0.5	(18.3)	(16.5)
Share of Affiliates' Earnings	45.9	49.5	75.8
Rail North America [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	0.5	7.9	10.3
Rail International [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	(0.3)	(0.3)	21.1
Portfolio Management [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	$ 45.2	$ 60.2	$ 60.9

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Investments in Affiliated Companies (Investments and Distributions) (Details 3) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) Vessel
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Net Sales Proceeds	$ 24.7	$ 19.4	$ 55.6
Number of vessels received | Vessel			5
Payments to Acquire Equity Method Investments	15.5	15.3	$ 101.3
Proceeds from Equity Method Investment, Dividends or Distributions	37.3	54.2	47.0
Rail North America [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	0.0	0.0	0.0
Proceeds from Equity Method Investment, Dividends or Distributions	5.1	20.0	0.0
Rail International [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	0.0	0.0	0.0
Proceeds from Equity Method Investment, Dividends or Distributions	0.0	0.0	0.0
Portfolio Management [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	15.5	15.3	101.3
Proceeds from Equity Method Investment, Dividends or Distributions	$ 32.2	$ 34.2	$ 47.0

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Investments in Affiliated Companies (Operating Results, Affiliates) (Details 4) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]
Gain on Sale of Investments			$ 2.5
Operating results for all affiliated companies of GATX
Revenues	$ 339.3	$ 339.0	334.5
Gains on sales of assets	37.6	33.7	43.5
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	$ 121.4	$ 99.6	$ 108.6

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Investments in Affiliated Companies (Balance Sheet, Affiliates) (Details 5) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Summarized balance sheet for all affiliated companies
Current assets	$ 185.0	$ 211.6
Noncurrent assets	3,254.1	3,195.1
Total assets	3,439.1	3,406.7
Current liabilities	285.5	378.4
Noncurrent liabilities	2,512.2	2,388.2
Shareholders’ equity	641.4	640.1
Total liabilities and shareholders' equity	$ 3,439.1	$ 3,406.7

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Investments in Affiliated Companies (Summarized Financial Data-RRPF) (Details 6) $ in Millions		12 Months Ended
		Dec. 31, 2015 USD ($) AircraftEngines	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Income Statement [Abstract]
Lease revenue		$ 339.3	$ 339.0	$ 334.5
Income taxes		(15.4)	(15.2)
Net income		121.4	99.6	108.6
Assets [Abstract]
Current assets		185.0	211.6
Other noncurrent assets		3,254.1	3,195.1
Total assets		3,439.1	3,406.7
Liabilities and Equity [Abstract]
Current liabilities		285.5	378.4
Long-term debt		2,512.2	2,388.2
Shareholders’ equity		641.4	640.1
Total liabilities and shareholders' equity		$ 3,439.1	3,406.7
RRPF Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Number of Aircraft Engines | AircraftEngines		436
Income Statement [Abstract]
Depreciation expense		$ (166.1)	(140.7)	(120.2)
Interest expense		(56.7)	(59.5)	(65.8)
Other expenses		(8.8)	(11.8)	(10.2)
Gains on sales of assets		33.1	22.7	35.2
Income before income taxes		131.6	112.3	106.3
Income taxes	[1]	(9.0)	(17.3)	0.4
Net income		122.6	95.0	106.7
Assets [Abstract]
Current assets		173.4	146.3
Operating assets, net of accumulated depreciation of $744.5 and $651.8	[2]	3,161.4	2,988.1
Total assets		3,334.8	3,134.4
Liabilities and Equity [Abstract]
Current liabilities		85.1	74.4
Long-term debt		2,391.1	2,295.7
Other liabilities		231.4	219.4
Shareholders’ equity		627.2	544.9
Total liabilities and shareholders' equity		3,334.8	3,134.4
RRPF Joint Ventures [Member] | Third Parties [Member]
Income Statement [Abstract]
Lease revenue		191.4	176.9	147.6
RRPF Joint Ventures [Member] | Rolls-Royce [Member]
Income Statement [Abstract]
Lease revenue		$ 138.7	$ 124.7	$ 119.7

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjgyZWQ3MDUyNGJlZjRjZjRhNzIzMWZhMThiZDM3YThhfFRleHRTZWxlY3Rpb246NjcyMzBFRkI5NjQ3NUE5NzAyODhGODUzNUJCMjU2OUYM}

[2] (a) All operating assets were pledged as collateral for long-term debt obligations.

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Investments in Affiliated Companies (Future Lease Receipts) (Details 7) $ in Millions	Dec. 31, 2015 USD ($)
Schedule of Equity Method Investments [Line Items]
2016	$ 970.3	[1]
2017	815.1	[1]
2018	684.3	[1]
2019	568.1	[1]
2020	442.6	[1]
Years thereafter	912.2	[1]
Total future receipts from leases	4,392.6	[1]
RRPF Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
2016	301.8
2017	270.4
2018	245.9
2019	198.5
2020	165.7
Years thereafter	486.7
Total future receipts from leases	1,669.0
RRPF Joint Ventures [Member] | Rolls-Royce [Member]
Schedule of Equity Method Investments [Line Items]
Total future receipts from leases	832.8
RRPF Joint Ventures [Member] | Third Parties [Member]
Schedule of Equity Method Investments [Line Items]
Total future receipts from leases	$ 836.2

[1] (1) The future contractual receipts due under our full-service operating leases include executory costs such as maintenance, car taxes, and insurance.

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Investments in Affiliated Companies (Future Debt Maturities) (Details 8) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
2016		$ 564.8
2017		412.7
2018		517.9
2019		550.0
2020		350.0
Thereafter		1,810.0
Total debt principal		4,205.4	$ 4,203.8
RRPF Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Total debt principal	[1]	$ 2,387.1

[1] (1) All debt obligations are nonrecourse to the shareholders

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Investments in Affiliated Companies (Textual) (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($) Business_Activity AircraftEngines Joint_Venture	Dec. 31, 2014 USD ($)	Dec. 31, 2013 EUR (€)	Dec. 31, 2013 USD ($)
Schedule of Equity Method Investments [Line Items]
Noncash or Part Noncash Acquisition, Value of Assets Acquired		$ 0.0	$ 1.1		$ 174.7
Loans to affiliated companies		11.2	16.3
Asset Impairment Charges		33.9	1.3		5.9
Share of affiliates' earnings (net of tax)		45.9	49.5		75.8
Gain on Sale of Investments					2.5
Portfolio proceeds		$ 482.2	264.0		385.3
RRPF Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
GATX ownership percentage in joint venture		50.00%
Number of joint venture investments | Joint_Venture		15
Number of business activities | Business_Activity		2
Number of Aircraft Engines | AircraftEngines		436
Number of Aircraft Engines Under Leasing Arrangement | AircraftEngines		224
Share of affiliates' earnings (net of tax)		$ 58.4	42.2		$ 46.5
RRPF Joint Ventures [Member] | Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Lease term	7 years	7 years
RRPF Joint Ventures [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Lease term	10 years	10 years
RRPF Joint Ventures [Member] | Aircraft Engines [Member]
Schedule of Equity Method Investments [Line Items]
Estimated useful lives of depreciable assets	25 years	25 years
Aae Cargo Ag [Member]
Schedule of Equity Method Investments [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent				37.50%	37.50%
Gain on Sale of Investments					$ 9.3
gmt_SalePrice					114.1
Portfolio proceeds	€ 68.2	$ 77.2		€ 67.5	91.1
Singco/Somagas [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Businesses and Interests in Affiliates					23.0
Singco/Somagas [Member]
Schedule of Equity Method Investments [Line Items]
Noncash or Part Noncash Acquisition, Value of Assets Acquired					101.3
Aae Cargo Ag [Member]
Schedule of Equity Method Investments [Line Items]
Portfolio proceeds		$ 0.0	$ 0.0		$ 91.1

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Investments in Affiliated Companies Advances to Affiliates (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Advances to Affiliate	$ 11.2	$ 16.3

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Variable Interest Entities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Variable Interest Entity, Qualitative or Quantitative Information, Type of Entity		one
Variable Interest, Held by Entity [Member]
Carrying amounts of assets and liabilities of the VIE
Operating assets, net of accumulated depreciation	[1]	$ 83.2	$ 88.1
Nonrecourse debt		$ 6.9	$ 15.9

[1] (1) All operating assets are pledged as collateral on the nonrecourse debt.

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Variable Interest Entities (Details 1) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	$ 161.4	$ 144.3
Maximum Exposure to Loss	161.4	144.3
Investments in Affiliates [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	161.2	143.9
Maximum Exposure to Loss	161.2	143.9
Other investment [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	0.2	0.4
Maximum Exposure to Loss	$ 0.2	$ 0.4

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Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Commercial Paper and Borrowings Under Bank Credit Facilities
Balance	$ 7.4	$ 72.1
Weighted average interest rate	1.22%	0.56%
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	$ 4,205.4	$ 4,203.8
Debt discount, net	(28.5)	(26.2)
Debt adjustment for fair value hedges	1.5	0.6
Total Debt	$ 4,178.4	4,178.2
Recourse Fixed Rate Debt Unsecured One [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 03, 2006
Final Maturity	Mar. 01, 2016
Fixed Interest Rate	5.80%
Total Debt	$ 200.0	200.0
Recourse Fixed Rate Debt Unsecured Two [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Nov. 19, 2010
Final Maturity	Jul. 15, 2016
Fixed Interest Rate	3.50%
Total Debt	$ 250.0	250.0
Recourse Fixed Rate Debt Unsecured Three [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 20, 2011
Final Maturity	Jul. 15, 2016
Fixed Interest Rate	3.50%
Total Debt	$ 100.0	100.0
Recourse Fixed Rate Debt Unsecured Four [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 04, 2014
Final Maturity	Mar. 04, 2017
Fixed Interest Rate	1.25%
Total Debt	$ 300.0	300.0
Recourse Fixed Rate Debt Unsecured Five [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Feb. 06, 2008
Final Maturity	Feb. 15, 2018
Fixed Interest Rate	6.00%
Total Debt	$ 200.0	200.0
Recourse Fixed Rate Debt Unsecured Six [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 19, 2013
Final Maturity	Jul. 30, 2018
Fixed Interest Rate	2.38%
Total Debt	$ 250.0	250.0
Recourse Fixed Rate Debt Unsecured Seven [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 27, 2010
Final Maturity	Oct. 31, 2018
Fixed Interest Rate	3.84%
Total Debt	$ 10.9	15.7
Recourse Fixed Rate Debt Unsecured Eight [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Nov. 29, 2010
Final Maturity	Nov. 30, 2018
Fixed Interest Rate	3.70%
Total Debt	$ 8.1	12.1
Recourse Fixed Rate Debt Unsecured Nine [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jan. 30, 2015
Final Maturity	Dec. 31, 2018
Fixed Interest Rate	1.20%
Total Debt	$ 54.3	0.0
Recourse Fixed Rate Debt Unsecured Twelve [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Nov. 19, 2013
Final Maturity	Mar. 15, 2019
Fixed Interest Rate	2.50%
Total Debt	$ 300.0	300.0
Recourse Fixed Rate Debt Unsecured Thirteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 04, 2014
Final Maturity	Jul. 30, 2019
Fixed Interest Rate	2.50%
Total Debt	$ 250.0	250.0
Recourse Fixed Rate Debt Unsecured Twelve [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Oct. 31, 2014
Final Maturity	Mar. 30, 2020
Fixed Interest Rate	2.60%
Total Debt	$ 250.0	250.0
Recourse Fixed Rate Debt Unsecured Fourteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Feb. 06, 2015
Final Maturity	Mar. 30, 2020
Fixed Interest Rate	2.60%
Total Debt	$ 100.0	0.0
Recourse Fixed Rate Debt Unsecured Fifteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	May 27, 2011
Final Maturity	Jun. 01, 2021
Fixed Interest Rate	4.85%
Total Debt	$ 250.0	250.0
Recourse Fixed Rate Debt Unsecured Sixteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 20, 2011
Final Maturity	Jun. 01, 2021
Fixed Interest Rate	4.85%
Total Debt	$ 50.0	50.0
Recourse Fixed Rate Debt Unsecured Seventeen [Member] [Domain]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 11, 2012
Final Maturity	Jun. 15, 2022
Fixed Interest Rate	4.75%
Total Debt	$ 250.0	250.0
Recourse Fixed Rate Debt Unsecured Seventeen [Member] [Domain]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 19, 2013
Final Maturity	Mar. 30, 2023
Fixed Interest Rate	3.90%
Total Debt	$ 250.0	250.0
Recourse Fixed Rate Debt Unsecured Eighteen [Member] [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Feb. 06, 2015
Final Maturity	Mar. 30, 2025
Fixed Interest Rate	3.25%
Total Debt	$ 300.0	0.0
Recourse Fixed Rate Debt Unsecured Nineteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 04, 2014
Final Maturity	Mar. 15, 2044
Fixed Interest Rate	5.20%
Total Debt	$ 300.0	300.0
Recourse Fixed Rate Debt Unsecured Twenty [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Feb. 06, 2015
Final Maturity	Mar. 30, 2045
Fixed Interest Rate	4.50%
Total Debt	$ 250.0	0.0
Recourse Fixed Rate Debt Unsecured Twenty One [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Apr. 14, 2005
Final Maturity	Apr. 15, 2015
Fixed Interest Rate	5.70%
Total Debt	$ 0.0	100.0
Recourse Fixed Rate Debt Unsecured Twenty Two [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Feb. 05, 2010
Final Maturity	May 15, 2015
Fixed Interest Rate	4.75%
Total Debt	$ 0.0	250.0
Recourse Fixed Rate Debt Unsecured Twenty Three [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 22, 2005
Final Maturity	Dec. 22, 2015
Fixed Interest Rate	5.75%
Total Debt	$ 0.0	70.0
Recourse Fixed Rate Debt [Member]
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	$ 3,923.3	3,647.8
Recourse Floating Rate Debt Unsecured One [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 02, 2011
Final Maturity	Aug. 31, 2016
Floating Interest Rate	0.94%
Total Debt	$ 5.2	8.0
Recourse Floating Rate Debt Secured Two [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 21, 2012
Final Maturity	Dec. 21, 2017
Floating Interest Rate	1.64%
Total Debt	$ 100.0	100.0
Recourse Floating Rate Debt Unsecured Eight [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jan. 22, 2013
Final Maturity	Dec. 21, 2017
Floating Interest Rate	1.64%
Total Debt	$ 10.0	10.0
Recourse Floating Rate Debt Unsecured Four [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Aug. 28, 2014
Final Maturity	Aug. 28, 2024
Floating Interest Rate	1.71%
Total debt principal	$ 100.0	100.0
Recourse Floating Rate Debt Unsecured Five [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 23, 2015
Final Maturity	Sep. 23, 2025
Floating Interest Rate	1.84%
Total Debt	$ 60.0	0.0
Recourse Floating Rate Debt Unsecured Six [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 15, 2010
Final Maturity	Oct. 31, 2015
Floating Interest Rate	1.43%
Total Debt		24.8
Recourse Floating Rate Debt Unsecured Seven [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 06, 2011
Final Maturity	Aug. 31, 2016
Floating Interest Rate	1.44%
Total Debt		15.3
Recourse Floating Rate Debt Unsecured Eight [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 29, 2006
Final Maturity	Sep. 30, 2016
Floating Interest Rate	2.02%
Total Debt		18.9
Recourse Floating Rate Debt Unsecured Nine [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 29, 2007
Final Maturity	Sep. 30, 2016
Floating Interest Rate	2.03%
Total Debt		8.5
Recourse Floating Rate Debt Unsecured Ten [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 18, 2007
Final Maturity	Oct. 31, 2016
Floating Interest Rate	1.98%
Total Debt		12.7
Recourse Floating Rate Debt Un Secured Eleven [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Aug. 31, 2012
Final Maturity	Dec. 31, 2019
Floating Interest Rate	2.33%
Total Debt		60.5
Recourse Floating Rate Debt Un Secured Twelve [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 27, 2013
Final Maturity	Dec. 31, 2020
Floating Interest Rate	1.73%
Total Debt		121.0
Recourse Floating Rate Debt Un Secured Thirteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Oct. 30, 2013
Final Maturity	Dec. 31, 2020
Floating Interest Rate	1.78%
Total Debt		30.2
Recourse Floating Rate Debt Unsecured Fourteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	May 05, 2014
Final Maturity	Dec. 31, 2020
Floating Interest Rate	1.85%
Total Debt		30.2
Total Recourse Floating Rate Debt [Member]
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	$ 275.2	540.1
Nonrecourse Fixed Rate Debt Secured One [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 30, 1997
Final Maturity	Sep. 20, 2016
Floating Interest Rate	6.69%
Total debt principal	$ 6.9	15.9
Total Nonrecourse Fixed Rate Debt [Member]
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	6.9	$ 15.9
Line of Credit US [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 575.0

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Debt (Details 1) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Maturities of GATX's debt obligations
2016	$ 564.8
2017	412.7
2018	517.9
2019	550.0
2020	350.0
Thereafter	1,810.0
Total debt principal	$ 4,205.4	$ 4,203.8

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Debt (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Instrument	Dec. 31, 2014 USD ($) Instrument	Dec. 31, 2013 USD ($)
Line of Credit Facility [Line Items]
Non-Recourse Debt	$ 6.9	$ 15.9
Operating assets pledged as collateral for notes	83.2
Other Short-term Borrowings	7.4	72.1
Annual commitment fees	$ 1.0	$ 1.0	$ 1.3
Fixed charge coverage ratio	2.9
Minimum debt covenant fixed charge coverage ratio	1.2
Amount of secured debt available to be borrowed in accordance with public debt covenants	$ 1,320.4
Line of Credit US [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility	575.0
Line of Credit Europe [Member]
Line of Credit Facility [Line Items]
Maximum amount of GRE transfer to GATX relating to loans and dividends	121.5
Restricted net assets	$ 374.4
Fair Value Hedging [Member]
Line of Credit Facility [Line Items]
Derivative, Number of Instruments Held | Instrument	8	8

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Fair Value Disclosure (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		$ 106.0	$ 7.0
Asset Impairment Charges		33.9	1.3	$ 5.9
Fair Value, Measurements, Recurring [Member]
Assets
Available for sale equity securities		3.3	4.4
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	[1]	1.8	1.8
Foreign Currency Cash Flow Hedge Asset at Fair Value	[2]	10.2
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	[2]		9.7
Liabilities
Interest rate derivatives	[1]	1.2	5.9
Foreign Currency Fair Value Hedge Liability at Fair Value	[2]	0.2
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member]
Assets
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	[2]	0.8
Liabilities
Foreign exchange rate derivatives	[2]	(2.4)	(1.6)
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Available for sale equity securities		3.3	4.4
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	[1]	1.8	1.8
Foreign Currency Cash Flow Hedge Asset at Fair Value	[2]	10.2
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	[2]		9.7
Liabilities
Interest rate derivatives	[1]	1.2	5.9
Foreign Currency Fair Value Hedge Liability at Fair Value	[2]	0.2
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member]
Assets
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	[2]	0.8
Liabilities
Foreign exchange rate derivatives	[2]		(1.6)
Other Nonoperating Income (Expense) [Member] | Cash Flow Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Effective portion reclassified from accumulated other comprehensive loss		(6.9)	(2.1)	0.0
Other Expense [Member] | Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		(6.1)	(11.4)	(0.6)
Other Expense [Member] | Aae Cargo Ag [Member] | Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		$ 5.1	10.4
Cardinal Marine [Domain]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		100.00%
Asset Impairment Charges		$ (19.0)
Nordic Vessels [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		32.5
Asset Impairment Charges		(30.8)
Portfolio Management [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		103.4
Asset Impairment Charges		31.0	(0.1)	$ 0.5
Portfolio Management [Member] | Cardinal Marine [Domain]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges		(19.0)
Railcars [Member] | Changes Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges		3.1
Gain (Loss) on Derivative Instruments [Member] | Other Nonoperating Income (Expense) [Member] | Cash Flow Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Effective portion reclassified from accumulated other comprehensive loss		$ 6.1	$ 2.1

[1] (1) Designated as hedges

[2] (2) Not designated as hedges

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Fair Value Disclosure (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	$ 33.9	$ 1.3	$ 5.9
Operating assets and facilities, net	5,698.4	5,688.0
Equipment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating assets and facilities, net	$ 34.0	$ 2.5

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Fair Value Disclosure (Details 2) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Expense [Member] | Fair Value Hedging [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Interest expense	[1]	$ (0.8)	$ 4.7	$ 4.9
Interest Expense [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Effective portion reclassified from accumulated other comprehensive loss		5.6	4.9	5.1
Other Comprehensive Income (Loss) [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Other comprehensive loss (effective portion)		5.3	5.1	(0.7)
Operating Expense [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Effective portion reclassified from accumulated other comprehensive loss		0.3	3.2	1.5
Other Nonoperating Income (Expense) [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Effective portion reclassified from accumulated other comprehensive loss		(6.9)	(2.1)	0.0
Other Expense [Member] | Non-designated [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Other expense		$ (6.1)	$ (11.4)	$ (0.6)

[1] (1) The fair value adjustments related to the underlying debt equally offset the amounts recognized in interest expense.

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Fair Value Disclosure (Details 3) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets
Loans	$ 8.8	$ 97.3
Liabilities
Non-Recourse Debt	6.9	15.9
Carrying Amount [Member]
Assets
Investment Funds	0.6	1.5
Loans		97.3
Liabilities
Recourse fixed rate debt	3,915.0	3,639.9
Recourse floating rate debt	275.2	540.0
Nonrecourse debt		15.9
Estimate of Fair Value Measurement [Member]
Assets
Investment Funds	1.2	2.4
Loans	8.7	97.4
Liabilities
Recourse fixed rate debt	3,882.6	3,775.0
Recourse floating rate debt	264.6	540.0
Nonrecourse debt	$ 7.1	$ 16.6

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Fair Value Disclosure (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Instrument	Dec. 31, 2014 USD ($) Instrument
Fair Value Disclosure (Textual) [Abstract]
Derivative, Notional Amount	$ 442.9	$ 0.0
Cash Flow Hedge Pre Tax Gain Loss to be Reclassified within Twelve Months	(5.8)
Expected After tax reclassification of net losses from accumulated other comprehensive income to earnings in Next Twelve Months	3.6
Aggregate fair value of all derivative instruments with Net liability position	1.4
Derivative Asset, Notional Amount	$ 550.0	$ 600.0
Fair Value Hedging [Member]
Fair Value Disclosure (Textual) [Abstract]
Number of instruments, outstanding | Instrument	8	8
Cash Flow Hedges [Member]
Fair Value Disclosure (Textual) [Abstract]
Number of instruments, outstanding | Instrument	10	7

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Asset Impairments (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Portfolio proceeds and other			$ 482.2	$ 264.0	$ 385.3
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property			99.7	79.3	80.7
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	$ 106.0		106.0	7.0
Asset Impairment Charges			$ 33.9	1.3	5.9
Cardinal Marine [Domain]
Noncontrolling Interest, Ownership Percentage by Parent	100.00%		100.00%
Asset Impairment Charges			$ (19.0)
Nordic Vessels [Member]
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	$ 32.5		32.5
Asset Impairment Charges			(30.8)
Portfolio Management [Member]
Impairment of Long-Lived Assets to be Disposed of			49.8
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	(9.0)	$ (4.5)
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	$ 103.4		103.4
Asset Impairment Charges			31.0	$ (0.1)	$ 0.5
Portfolio Management [Member] | Nordic Vessels [Member]
Asset Impairment Charges			0.0
Portfolio Management [Member] | Cardinal Marine [Domain]
Asset Impairment Charges			(19.0)
Nordic Vessels [Member] | Portfolio Management [Member]
Portfolio proceeds and other			124.4
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property			(21.6)
Fair Value, Measurements, Nonrecurring [Member] | Changes Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Railcars [Member]
Asset Impairment Charges			$ 3.1

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Pension and Other Post-Retirement Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in Fair Value of Plan Assets
Plan assets at beginning of year	$ 456.9
Company contributions	1.9	$ 1.8	$ 1.6
Plan assets at end of year	416.1	456.9
Amount Recognized
Other liabilities	(94.6)	(86.6)
Accumulative other comprehensive loss:
After-tax amount recognized in accumulated other comprehensive loss	99.9	107.7	78.2	$ 131.1
Defined Benefit Pension [Member]
Change in Benefit Obligation
Benefit obligation at beginning of year	502.7	442.7
Service cost	7.4	5.9	6.7
Interest cost	19.6	20.7	18.4
Actuarial loss	22.6	(67.0)
Benefits paid	(36.9)	(31.2)
Effect of foreign exchange rate changes	(2.5)	(2.4)
Benefit obligation at end of year	475.0	502.7	442.7
Change in Fair Value of Plan Assets
Plan assets at beginning of year	456.9	447.8
Actual return on plan assets	(4.6)	40.3
Effect of exchange rate changes	(2.2)	(2.4)
Company contributions	2.9	2.4
Benefits paid	(36.9)	(31.2)
Plan assets at end of year	416.1	456.9	447.8
Funded Status at end of year	(58.9)	(45.8)
Amount Recognized
Other liabilities	(58.9)	(45.8)
Accumulative other comprehensive loss:
Net actuarial loss	163.3	170.9
Prior service credit (cost)	(1.1)	(2.1)
Accumulated other comprehensive loss	162.2	168.8
After-tax amount recognized in accumulated other comprehensive loss	101.3	105.4
Retiree Health and Life [Member]
Change in Benefit Obligation
Benefit obligation at beginning of year	40.8	40.4
Service cost	0.2	0.1	0.2
Interest cost	1.3	1.6	1.6
Actuarial loss	3.6	(2.6)
Benefits paid	(2.9)	(3.9)
Effect of foreign exchange rate changes	0.0	0.0
Benefit obligation at end of year	35.0	40.8	40.4
Change in Fair Value of Plan Assets
Plan assets at beginning of year	0.0	0.0
Actual return on plan assets	0.0	0.0
Effect of exchange rate changes	0.0	0.0
Company contributions	2.9	3.9
Benefits paid	(2.9)	(3.9)
Plan assets at end of year	0.0	0.0	$ 0.0
Funded Status at end of year	(35.0)	(40.8)
Amount Recognized
Other liabilities	(35.0)	(40.8)
Accumulative other comprehensive loss:
Net actuarial loss	(0.2)	3.3
Prior service credit (cost)	(2.0)	0.4
Accumulated other comprehensive loss	(2.2)	3.7
After-tax amount recognized in accumulated other comprehensive loss	$ (1.4)	$ 2.3

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Pension and Other Post-Retirement Benefits (Details 1) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligations	$ 438.3	$ 502.7
Fair value of plan assets	378.6	456.9
Pension plans with an accumulated benefit obligation in excess of plan assets
Accumulated benefit obligations	412.6	170.6
Fair value of plan assets	$ 378.6	$ 140.5

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Pension and Other Post-Retirement Benefits (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of pension and other post retirement benefit costs
Special termination benefits	$ 7.3
Defined Benefit Pension [Member]
Components of pension and other post retirement benefit costs
Service cost	7.4	$ 5.9	$ 6.7
Interest cost	19.6	20.7	18.4
Expected return on plan assets	(25.8)	(28.4)	(27.5)
Special termination benefits	7.3
Amortization of unrecognized prior service credit	(1.0)	(1.0)	(1.0)
Unrecognized net actuarial loss (gain)	14.8	11.3	14.9
Net periodic (benefit) cost	22.3	8.5	11.5
Retiree Health and Life [Member]
Components of pension and other post retirement benefit costs
Service cost	0.2	0.1	0.2
Interest cost	1.3	1.6	1.6
Expected return on plan assets	0.0	0.0	0.0
Special termination benefits	1.7
Amortization of unrecognized prior service credit	(0.1)	(0.1)	(0.1)
Unrecognized net actuarial loss (gain)	(0.2)	(0.1)	0.0
Net periodic (benefit) cost	$ 2.9	$ 1.5	$ 1.7

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Pension and Other Post-Retirement Benefits (Details 3)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Domestic defined benefit pension plans [Member] | Salaried Funded and Unfunded Plans [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.46%	4.05%
Rate of compensation and pension-in-payment increases, benefit obligation	2.50%	2.50%
Discount rate, net periodic cost (benefit)	4.05%	4.80%
Expected return on plan assets, net periodic cost (benefit)	6.50%	7.60%
Rate of compensation and pension-in-payment increases, net periodic cost (benefit)	2.50%	3.00%
Domestic defined benefit pension plans [Member] | Hourly Funded Plans [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.51%	4.10%
Discount rate, net periodic cost (benefit)	4.10%	4.90%
Expected return on plan assets, net periodic cost (benefit)	6.35%	6.90%
Foreign Funded Pension Plans, Defined Benefit [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	3.60%	3.20%
Rate of compensation and pension-in-payment increases, benefit obligation	3.00%	2.90%
Discount rate, net periodic cost (benefit)	3.20%	4.40%
Expected return on plan assets, net periodic cost (benefit)	4.80%	5.40%
Rate of compensation and pension-in-payment increases, net periodic cost (benefit)	2.90%	3.40%
Retiree Health and Life [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, net periodic cost (benefit)	3.65%	4.20%
Retiree Health and Life [Member] | Salaried Health [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	3.96%	3.65%
Retiree Health and Life [Member] | Hourly Health [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.11%	3.85%
Discount rate, net periodic cost (benefit)	3.85%	4.60%
Retiree Health and Life [Member] | Salaried Life Insurance [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.40%	4.00%
Discount rate, net periodic cost (benefit)	4.00%	4.75%
Retiree Health and Life [Member] | Hourly Life Insurance [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.04%	3.70%
Discount rate, net periodic cost (benefit)	3.70%	4.40%

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Pension and Other Post-Retirement Benefits (Details 4)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Post Age 65	6.00%	7.50%
Medical Claims [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Pre Age 65	7.00%	7.50%
Review of historical returns
Rate to which the cost trend is expected to decline (the ultimate trend rate)	4.50%	5.00%
Year that rate reaches the ultimate trend rate	2024	2023
Prescription Drugs Claims [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Pre Age 65	10.00%	7.00%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Post Age 65	10.50%	7.00%
Review of historical returns
Rate to which the cost trend is expected to decline (the ultimate trend rate)	4.50%	5.00%
Year that rate reaches the ultimate trend rate	2024	2023

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Pension and Other Post-Retirement Benefits (Details 5) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Effect on the other post-retirement benefit cost and obligation
Effect on total of service and interest cost, one percentage point increase	$ 0.1
Effect on total of service and interest cost, one percentage point decrease	(0.1)
Effect on post-retirement benefit obligation, one percentage point increase	1.5
Effect on post-retirement benefit obligation, one percentage point decrease	$ (1.3)

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Pension and Other Post-Retirement Benefits (Details 6) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 416.1	$ 456.9
Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets
Domestic defined benefit pension plans [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	100.00%
Actual plan asset allocations	100.00%	100.00%
Domestic defined benefit pension plans [Member] | Equity Securities [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	52.00%
Actual plan asset allocations	50.20%	51.70%
Domestic defined benefit pension plans [Member] | Debt Securities [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	44.00%
Actual plan asset allocations	44.40%	43.90%
Domestic defined benefit pension plans [Member] | Real Estate [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	4.00%
Actual plan asset allocations	5.40%	4.30%
Domestic defined benefit pension plans [Member] | Cash [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	0.00%
Actual plan asset allocations	0.00%	0.10%
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 14.2	$ 15.8
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets

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Pension and Other Post-Retirement Benefits (Details 7) - Foreign Pension Plans, Defined Benefit [Member]	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Weighted-average asset allocations of its foreign funded pension plan
Target asset allocation percentage	100.00%
Actual plan asset allocations	100.00%	100.00%
Equity Securities [Member]
Weighted-average asset allocations of its foreign funded pension plan
Target asset allocation percentage	36.80%
Actual plan asset allocations	36.80%	37.70%
Debt Securities [Member]
Weighted-average asset allocations of its foreign funded pension plan
Target asset allocation percentage	63.20%
Actual plan asset allocations	63.20%	62.30%

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Pension and Other Post-Retirement Benefits (Details 8) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Fair value of pension plan assets
Assets	$ 416.1	$ 456.9
Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	14.2	15.8
Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	401.9	441.1
Short-term investment funds [Member]
Fair value of pension plan assets
Assets	1.6	0.9
Short-term investment funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	1.6	0.9
Short-term investment funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	$ 0.0	$ 0.0
Common stock [Member]
Fair value of pension plan assets
Assets
Common stock [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets
Common stock [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets
Common stock collective funds [Member]
Fair value of pension plan assets
Assets	$ 190.4	$ 215.2
Common stock collective funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	0.0	0.0
Common stock collective funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	190.4	215.2
Fixed income collective trust funds [Member]
Fair value of pension plan assets
Assets	160.4	177.8
Fixed income collective trust funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	0.0	0.0
Fixed income collective trust funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	160.4	177.8
Real estate investment funds [Member]
Fair value of pension plan assets
Assets	20.2	17.9
Real estate investment funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	0.0	0.0
Real estate investment funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	20.2	17.9
Loan Fund [Member]
Fair value of pension plan assets
Assets	30.9	30.2
Loan Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	0.0	0.0
Loan Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	30.9	30.2
UNITED STATES | Common stock [Member]
Fair value of pension plan assets
Assets		13.3
UNITED STATES | Common stock [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	11.4	13.3
International [Member] | Common stock [Member]
Fair value of pension plan assets
Assets		1.6
International [Member] | Common stock [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	$ 1.2	$ 1.6

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Pension and Other Post-Retirement Benefits (Details 9) $ in Millions	Dec. 31, 2015 USD ($)
Qualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2016	$ 42.9
2017	27.9
2018	28.1
2019	28.2
2020	28.6
Years 2021-2025	144.5
Total	300.2
Nonqualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2016	2.5
2017	2.6
2018	2.6
2019	3.2
2020	3.5
Years 2021-2025	18.3
Total	32.7
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2016	3.9
2017	3.8
2018	3.3
2019	2.8
2020	2.6
Years 2021-2025	11.6
Total	$ 28.0

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Pension and Other Post-Retirement Benefits (Details 10) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Multiemployer Plans
Contributions		$ 8.2	$ 8.5	$ 8.1
American Maritime Officers Pension Plan [Member]
Multiemployer Plans
Zone Status		Yellow
Contributions	[1]	$ 1.4	1.5	1.4
Collective Bargaining		Jan. 15, 2017
Other Multiemployer Post Retirement Plans [Member]
Multiemployer Plans
Contributions		$ 6.8	$ 7.0	$ 6.7

[1] (1)Our contributions represented more than 5% of the total contributions to the plan during each year and no surcharge was imposed for any year. The actuary for the American Maritime Officers Pension Plan certified that the plan is in endangered status (i.e. “yellow zone” as defined by the Pension Protection Act of 2006) for the plan year beginning October 1, 2013, because it has funding or liquidity problems, or both. A rehabilitation plan, as defined by the Employee Retirement Security Act of 1974, was instituted under which certain adjustable benefits were reduced or eliminated, and we are required to contribute at a negotiated rate per day worked by each employee.

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Pension and Other Post Retirement Benefits (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Entity Postretirement_Plan	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of Postretirement Plans | Postretirement_Plan	2
Pension and Other Post Retirement Details (Textual) [Abstract]
Collective bargaining agreement, beginning	2017-01
Defined Benefit Plan, Contributions by Employer	$ 1.9	$ 1.8	$ 1.6
Multiemployer plan contributions	5.00%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of days notice upon which redemptions from real estate funds are available	45 days
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of days notice upon which redemptions from real estate funds are available	60 days
Defined Benefit Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Aggregate accumulated benefit obligation	$ 449.4	475.8
Unrecognized net actuarial loss (gain)	14.8	11.3	14.9
Prior Service Credit	(1.0)	(1.0)	(1.0)
Defined benefit plan, estimated future employer contributions in next fiscal year	6.4
Pension and Other Post Retirement Details (Textual) [Abstract]
Defined Benefit Plan, Contributions by Employer	2.9	2.4
Other Post-retirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized net actuarial loss (gain)	(0.2)	(0.1)	0.0
Prior Service Credit	(0.1)	(0.1)	$ (0.1)
Pension and Other Post Retirement Details (Textual) [Abstract]
Defined Benefit Plan, Contributions by Employer	$ 2.9	$ 3.9
Loan Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of Limited Liability Company with Investments | Entity	1

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Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 1.9	$ 1.8	$ 1.6
Special termination benefits	7.3
Defined Benefit Plan, Fair Value of Plan Assets	416.1	456.9
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(94.6)	(86.6)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	99.9	107.7	78.2	$ 131.1
Other Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation		40.8
Defined Benefit Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	475.0	502.7	442.7
Defined Benefit Plan, Service Cost	7.4	5.9	6.7
Defined Benefit Plan, Contributions by Employer	2.9	2.4
Unrecognized net actuarial loss (gain)	10.4
Unrecognized prior service credit	(1.0)
Defined Benefit Plan, Interest Cost	19.6	20.7	18.4
Defined Benefit Plan, Actuarial Gain (Loss)	(22.6)	67.0
Defined Benefit Plan, Benefits Paid	(36.9)	(31.2)
Special termination benefits	7.3
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)	(2.5)	(2.4)
Defined Benefit Plan, Fair Value of Plan Assets	416.1	456.9	447.8
Defined Benefit Plan, Actual Return on Plan Assets	(4.6)	40.3
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(2.2)	(2.4)
Defined Benefit Plan, Funded Status of Plan	(58.9)	(45.8)
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(58.9)	(45.8)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Actuarial Loss (Gain) Recognized	163.3	170.9
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Prior Service Credit (Cost) Recognized	(1.1)	(2.1)
Accumulated other comprehensive loss	162.2	168.8
Defined Benefit Plan, Amounts Recognized in Balance Sheet	103.3	123.0
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	101.3	105.4
Retiree Health and Life [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	35.0	40.8	40.4
Defined Benefit Plan, Service Cost	0.2	0.1	0.2
Defined Benefit Plan, Contributions by Employer	2.9	3.9
Unrecognized net actuarial loss (gain)	(0.1)
Unrecognized prior service credit	(0.2)
Defined Benefit Plan, Interest Cost	1.3	1.6	1.6
Defined Benefit Plan, Plan Amendments	(2.5)
Defined Benefit Plan, Actuarial Gain (Loss)	(3.6)	2.6
Defined Benefit Plan, Benefits Paid	(2.9)	(3.9)
Special termination benefits	1.7
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)	0.0	0.0
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	$ 0.0
Defined Benefit Plan, Actual Return on Plan Assets	0.0	0.0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	0.0	0.0
Defined Benefit Plan, Funded Status of Plan	(35.0)	(40.8)
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(35.0)	(40.8)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Actuarial Loss (Gain) Recognized	(0.2)	3.3
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Prior Service Credit (Cost) Recognized	(2.0)	0.4
Accumulated other comprehensive loss	(2.2)	3.7
Defined Benefit Plan, Amounts Recognized in Balance Sheet	(37.2)	(37.1)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	$ (1.4)	$ 2.3
Recourse Floating Rate Debt Un Secured Thirteen [Member]
Defined Benefit Plan Disclosure [Line Items]
Debt Instrument, Maturity Date	Dec. 31, 2020

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Share Based Compensation - Weighted Average and Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average estimated fair value	$ 18.16	$ 18.12	$ 18.89
Quarterly dividend rate	$ 0.38	$ 0.33	$ 0.30
Expected term of stock appreciation rights, in years	4 years 8 months	4 years 4 months 24 days	4 years 8 months 6 days
Risk-free interest rate	1.20%	1.30%	0.70%
Dividend yield	2.60%	2.30%	2.60%
Expected stock price volatility	29.20%	30.30%	42.40%
Present value of dividends	$ 6.90	$ 5.76	$ 5.60

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Share Based Compensation - Outstanding Options and Rights (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, Number of Stock Options and Stock Appreciation Rights | shares	1,490
Granted, Number of Stock Options and Stock Appreciation Rights | shares	342
Exercised, Number of Stock Options and Stock Appreciation Rights | shares	231
Forfeitured/Cancelled, Number of Stock Options and Stock Appreciation Rights | shares	26
Expired, Number of Stock Options and Stock Appreciation Rights | shares	1
Ending balance, Number of Stock Options and Stock Appreciation Rights | shares	1,574
Vested and exercisable at end of the year, Number of Stock Options and Stock Appreciation Rights | shares	976
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning balance, Weighted Average Exercise Price | $ / shares	$ 39.65
Granted, Weighted Average Exercise Price | $ / shares	56.91
Exercised, Weighted Average Exercise Price | $ / shares	25.96
Forfeited/Cancelled, Weighted Average Exercise Price | $ / shares	53.29
Expired, Weighted Average Exercise Price | $ / shares	50.02
Ending balance, Weighted Average Exercise Price | $ / shares	45.18
Vested and exercisable at end of the year | $ / shares	$ 38.68

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Share Based Compensation - Aggregate Intrinsic Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options and Stock Appreciation Rights, Outstanding, Weighted Average Remaining Contractual Term	3 years 8 months
Stock Options and Stock Appreciation Rights, Vested, Weighted Average Remaining Contractual Term	2 years 8 months
Stock Options and Stock Appreciation Rights, Exercised, Aggregate Intrinsic Value	$ 6.3
Stock Options and Stock Appreciation Rights, Outstanding, Aggregate Intrinsic Value	6.3
Stock Option SAR Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options and Stock Appreciation Rights, Exercised, Aggregate Intrinsic Value	$ 6.2	$ 11.8	$ 6.9

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Share-Based Compensation Share-Based Compensation - Restricted Stock and Performance Shares (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning balance, Weighted Average Grant Date Fair Value	$ 18.12	$ 18.89
Ending balance, Weighted Average Grant Date Fair Value	$ 18.16	$ 18.12
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance, Number of Share Units Outstanding	177,210
Granted, Number of Share Units Outstanding	68,710
Vested, Number of Share Units Outstanding	63,748
Forfeited, Number of Share Units Outstanding	(10,232)
Ending balance, Number of Share Units Outstanding	171,940	177,210
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning balance, Weighted Average Grant Date Fair Value	$ 48.90
Granted, Weighted Average Grant Date Fair Value	56.73
Vested, Weighted Average Grant Date Fair Value	44.92
Forfeited, Weighted Average Grant Date Fair Value	54.33
Ending balance, Weighted Average Grant Date Fair Value	$ 53.18	$ 48.90
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance, Number of Share Units Outstanding	175,069
Granted, Number of Share Units Outstanding	61,740
Net increase due to estimated performance, Number of Share Units Outstanding	(22,578)
Vested, Number of Share Units Outstanding	92,991
Ending balance, Number of Share Units Outstanding	121,240	175,069
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning balance, Weighted Average Grant Date Fair Value	$ 48.95
Granted, Weighted Average Grant Date Fair Value	55.54
Net increase due to estimated performance, Weighted Average Grant Date Fair Value	54.39
Vested, Weighted Average Grant Date Fair Value	45.01
Ending balance, Weighted Average Grant Date Fair Value	$ 54.32	$ 48.95

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Share Based Compensation (Details Textual) - USD ($) $ / shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for awards	3,500,000.0
Number of shares available for future issuance	1,800,000
Share-based compensation expense	$ 11.6	$ 14.0	$ 13.1
Tax benefit from share-based compensation expense	$ 4.4	5.3	$ 4.9
Award vesting period	3 years
Cash proceeds from exercise of stock options		$ 1.2
Units outstanding	1,574,000	1,490,000
Portion of an award vesting for the 2012 SAR grant	1/3 vesting after each year
Award vesting percentage	33.33%
Stock Options SARs Granted Since 2004 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum granting period for stock option	7 years
Stock Option SAR Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 6.0
Compensation cost not yet recognized, period for recognition	1 year 8 months
Restricted Stock and Performance Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Compensation cost not yet recognized	$ 6.3
Compensation cost not yet recognized, period for recognition	2 years 1 month
Fair value of restricted stock units and performance shares vested during period	$ 7.2	$ 6.6	$ 7.5
Phantom Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted during period	23,431
Units outstanding	166,021

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Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	41.00%	32.70%	41.20%
GATX income taxes on sale of AAE	$ 0.0	$ 0.0	$ 23.2
Deferred Tax Liabilities
Book/tax basis difference due to depreciation	1,058.1	963.8
Investments in affiliated companies	72.9	99.7
Lease accounting (other than leveraged)	7.3	10.5
Other	0.0	0.1
Total deferred tax liabilities	1,138.3	1,074.1
Deferred Tax Assets
Alternative minimum tax credit	14.8	9.2
Federal net operating loss	13.2	41.8
Foreign tax credit	5.8	3.6
Valuation on foreign tax credit	(5.8)	(3.6)
State net operating loss	27.7	28.7
Valuation on state net operating loss	(12.6)	(11.3)
Foreign net operating loss	3.6	5.8
Deferred Tax Assets, Valuation Allowance	(0.3)	(0.2)
Accruals not currently deductible for tax purposes	22.2	18.7
Allowance for losses	3.2	1.7
Pension and post-retirement benefits	35.8	32.6
Other	12.4	9.8
Total deferred tax assets	120.0	136.8
Net deferred tax liabilities	1,018.3	937.3
Gross liability for unrecognized tax benefits
Beginning balance	5.6	5.7
Reductions due to expiration of the applicable statute of limitations	0.0	0.4
Reductions due to settlement of audit issues	(0.1)	(0.3)
Ending balance	5.7	5.6	5.7
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	0.0	0.0	3.9
Expiration of the applicable statute of limitations		(0.2)
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	$ 0.9	$ 0.0	$ 0.0

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Income Taxes (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Provision for Income Taxes, Equity Method Investment	$ (0.5)	$ 18.3	$ 16.5
Equity Method Investment, Summarized Financial Information, Income Tax	15.4	15.2
Income before income taxes
Domestic	174.7	137.9	66.0
Foreign	95.6	93.3	93.0
Income before Income Taxes and Share of Affiliates’ Earnings	$ 270.3	$ 231.2	$ 159.0

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Income Taxes (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Equity Method Investment, Summarized Financial Information, Income Tax	$ 15.4	$ 15.2
Current
Federal	5.6	0.7	$ 1.4
State and local	(0.2)	0.6	0.0
Current domestic taxes	5.4	1.3	1.4
Foreign	15.3	13.0	10.5
Total current taxes	20.7	14.3	11.9
Deferred
Federal	44.7	45.0	36.6
State and local	33.7	5.6	5.3
Deferred domestic taxes	78.4	50.6	41.9
Foreign	11.8	10.8	11.7
Total deferred taxes	$ 90.2	$ 61.4	$ 53.6

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Income Taxes (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of reasons for difference between GATX's effective income tax rate and federal statutory income tax
Income taxes at federal statutory rate	$ 94.6	$ 80.9	$ 55.6
Adjust for effect of:
GATX income taxes on sale of AAE	0.0	0.0	23.2
Foreign tax credits	0.0	0.0	(3.9)
Foreign earnings taxed at lower rates	(6.2)	(8.5)	(10.3)
Tax effect of foreign dividends	0.9	0.0	0.0
Corporate owned life insurance	(0.9)	(0.6)	(0.5)
State income taxes	7.6	4.1	1.5
State deferred tax rate change impact	14.1	0.0	0.0
Other	0.8	(0.2)	(0.1)
Income taxes	$ 110.9	$ 75.7	$ 65.5
Effective income tax rate	41.00%	32.70%	41.20%

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Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Equity Method Investment, Summarized Financial Information, Income Tax	$ 15.4	$ 15.2
Effective Income Tax Rate Reconciliation, Percent	41.00%	32.70%	41.20%
State deferred tax rate change impact	$ 14.1	$ 0.0	$ 0.0
Cumulative amount of undistributed earning of foreign subsidiaries	847.7
Alternative minimum tax credit	14.8	9.2
Foreign tax credit	5.8	3.6
Foreign tax credits valuation allowance	5.8	3.6
State net operating loss	27.7	28.7
State net operating loss carryforwards valuation allowance	12.6	11.3
Foreign net operating loss	3.6	5.8
Unrecognized Tax Benefits	5.7	5.6	5.7
Decrease in income tax expenses unrecognized tax benefits if recognized	3.8	3.6
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	0.1	0.3
Reductions due to expiration of the applicable statute of limitations	0.0	0.4
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Amount		0.2
Tax On Gain Of Affiliate Sale	0.0	$ 0.0	(23.2)
Domestic [Member]
Operating Loss Carryforwards [Line Items]
Amount of U.S. federal tax net operating loss	37.7
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Equity Method Investment, Summarized Financial Information, Income Tax	7.7		$ 7.6
Amount of U.S. federal tax net operating loss	$ 3.3

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Concentrations (Details)	12 Months Ended
	Dec. 31, 2015 Service_Center
Concentration [Abstract]
Concentration Risk, Labor Subject to Collective Bargaining Arrangements	.42
Multiemployer Plans, Collective-Bargaining Arrangement, Description	three
Canadian
Concentration [Abstract]
Number of service centers	3
Petroleum Industry [Member]
Concentration [Abstract]
Approximate percentage of revenue	30.00%
Chemical Industry [Member]
Concentration [Abstract]
Approximate percentage of revenue	18.00%
Transportation Industry [Member]
Concentration [Abstract]
Approximate percentage of revenue	15.00%
Steel Industry [Member]
Concentration [Abstract]
Approximate percentage of revenue	9.00%
Food/Agriculture [Member]
Concentration [Abstract]
Approximate percentage of revenue	7.00%
Customer Concentration Risk [Member]
Concentration [Abstract]
Approximate percentage of revenue	10.00%
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year [Member]
Concentration [Abstract]
Concentration Risk, Labor Subject to Collective Bargaining Arrangements	.22
ASC [Member]
Concentration [Abstract]
Concentration Risk, Labor Subject to Collective Bargaining Arrangements	twelve
GERMANY
Concentration [Abstract]
Concentration Risk, Labor Subject to Collective Bargaining Arrangements	one

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Commercial Commitments (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value		$ 4.1	$ 5.1
Total commercial commitments	[1]	31.0	37.6
Lease payment guarantees [Member]
Guarantor Obligations [Line Items]
Total commercial commitments		22.1	28.5
Standby letters of credit [Member]
Guarantor Obligations [Line Items]
Total commercial commitments		$ 8.9	$ 9.1

[1] (1) The carrying value of liabilities on the balance sheet for commercial commitments was $4.1 million at December 31, 2015 and $5.1 million at December 31, 2014. The expirations of these commitments range from 2017 to 2023. We are not aware of any event that would require us to satisfy any of our commitments.

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Commercial Commitments (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Guarantees [Abstract]
Amount of liability included in recorded value of the company's commitment	$ 4.1	$ 5.1
Expiration of commitment range	2017 to 2023

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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Numerator:
Net income	$ 58.2		$ 39.5		$ 45.4		$ 62.2		$ 58.5		$ 51.3		$ 53.1		$ 42.1		$ 205.3	$ 205.0		$ 169.3
Denominator:
Denominator for basic earnings per share — weighted average shares																	43.1	45.0		46.4
Effect of dilutive securities:
Equity compensation plans																	0.7	0.8		0.7
Denominator for diluted earnings per share — adjusted weighted average and assumed conversion																	43.8	45.8		47.1
Basic earnings per share (in dollars per share)	$ 1.38	[1]	$ 0.92	[1]	$ 1.04	[1]	$ 1.41	[1]	$ 1.32	[1]	$ 1.16	[1]	$ 1.17	[1]	$ 0.92	[1]	$ 4.76	$ 4.55	[1]	$ 3.64
Diluted earnings per share (in dollars per share)	$ 1.37	[1]	$ 0.91	[1]	$ 1.03	[1]	$ 1.39	[1]	$ 1.30	[1]	$ 1.14	[1]	$ 1.15	[1]	$ 0.90	[1]	$ 4.69	$ 4.48	[1]	$ 3.59

[1] (1)Quarterly earnings per share may not be additive, as per share amounts are computed independently for each quarter and the full year is based on the respective weighted average common shares and common stock equivalents outstanding.(2)In the third quarter of 2015, net income included $31.1 million of net impairment losses and $4.5 million of net disposition gains, both related to the decision to exit the majority of the marine investments within the Portfolio Management segment.(3)In the fourth quarter of 2015, net income included $9.0 million of net disposition gains related to the decision to exit the majority of the marine investments within the Portfolio Management segment. In addition, we recorded $14.1 million of expense attributable to an increase in our effective state income tax rate, $7.7 million of benefit resulting from a reduction in the statutory income tax rate in the UK, and $5.6 million of net expenses associated with an early retirement program offered to certain employees.

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Goodwill (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 79.7	$ 86.1

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Allowance for Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Changes in the allowance for possible losses
Beginning balance	$ 5.7	$ 5.2
(Reversal) provision for losses	6.6	0.8
Charges to allowance	(1.9)	(0.3)
Recoveries and other, including foreign exchange adjustments	(0.1)	0.0
Ending balance	$ 10.3	$ 5.7

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Allowance for Losses (Details Textual) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Losses (Textual) [Abstract]
Allowances for trade receivables	$ (10.3)	$ (5.7)	$ (5.2)
Allowance for Trade Receivables [Member]
Allowance for Losses (Textual) [Abstract]
Allowances for trade receivables	$ (6.3)	$ (4.5)
Allowances for trade receivables as percentage of rent and other receivables	9.10%	5.20%
Allowance for Finance Leases [Member]
Allowance for Losses (Textual) [Abstract]
Allowances for trade receivables	$ (4.0)	$ 1.2

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Other Assets and Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Components of Other Assets reported on the consolidated balance sheets
Inventory	$ 55.2	$ 52.0
Office furniture, fixtures and other equipment, net of accumulated depreciation	31.8	34.1
Derivatives	12.7	11.5
Deferred financing costs	3.4	4.0
Prepaid items	14.3	12.4
Assets held for sale	106.0	7.0
Assets held for sale	4.2	6.0
Prepaid pension	0.7	0.0
Other	84.1	84.4
Total	$ 312.4	$ 211.4

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Other Assets and Other Liabilities (Details 1) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Components of Other Liabilities reported on the consolidated balance sheets
Accrued operating lease expense	$ 19.3	$ 43.4
Pension and other post-retirement liabilities	94.6	86.6
Deferred gains on sale-leasebacks	44.8	49.0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3.8	3.6
Environmental reserves	13.2	13.8
Deferred income	7.7	5.6
Derivatives	3.7	7.5
Other Liabilities, Noncurrent	33.5	36.6
Total	$ 220.6	$ 246.1

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Shareholders' Equity (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 31, 2016	Jun. 30, 2014
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Stock Repurchase Program, Authorized Amount			$ 200,000,000	$ 300,000,000	$ 250,000,000
Common stock reserved for conversion and incentive plans
Common stock reserved for conversion and incentive plans	5.8
Stock Repurchased During Period, Shares	2.4	1.9	1.4
Share-based compensation award plans [Member]
Common stock reserved for conversion and incentive plans
Common stock reserved for conversion and incentive plans	2.3
GATX Corporation 2004 Equity Incentive Compensation Plan [Member]
Common stock reserved for conversion and incentive plans
Common stock reserved for conversion and incentive plans	3.5
Restricted Stock and Performance Share Awards [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years

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Shareholders' Equity (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 31, 2016	Jun. 30, 2014
Shareholders' Equity (Textual)
Common stock authorized under repurchase program			$ 200,000,000	$ 300,000,000	$ 250,000,000
Stock repurchases, Shares	(2,400,000)	(1,900,000)	(1,400,000)
Payments for stock repurchases	$ (125,400,000)	$ (124,600,000)	$ (68,600,000)
Common stock, shares authorized	120,000,000	120,000,000
Common Stock, Par or Stated Value Per Share	$ 0.625	$ 0.625
Common stock, shares issued	66,776,290.000000	66,600,984
Common stock, shares outstanding	41,970,098	44,198,850
Series A and B $2.50 Cumulative Convertible Preferred Stock [Member]
Shareholders' Equity (Textual)
Preferred stock, shares authorized	5,000,000
Preferred stock, par value	$ 1.00
Preferred stock, shares outstanding		15,567
Cumulative annual cash dividend per share on preferred stock	$ 2.50

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance, Foreign Currency Translation Gain (Loss)	$ (21.9)	$ 57.2	$ 31.4
Change in Foreign Currency Translation Gain (Loss)	(55.8)	(79.1)	25.8
Foreign currency translation gain loss before reclassification adjustment into earnings	0.0	0.0	0.0
Foreign Currency Translation Gain (Loss), Income tax effect	0.0	0.0	0.0
Ending Balance, Foreign Currency Translation Gain (Loss)	(77.7)	(21.9)	57.2
Beginning Balance, Unrealized Gain (Loss) on Securities	0.3	0.4	(0.4)
Change in Unrealized Gain (Loss) on Securities	(1.0)	(0.2)	1.4
Unrealized Gain (Loss) on Securities, Reclassification adjustments into earnings	0.0	0.0	0.0
Unrealized Gain (Loss) on Securities, Income tax effect	0.4	0.1	(0.6)
Ending Balance, Unrealized Gain (Loss) on Securities	(0.3)	0.3	0.4
Beginning Balance, Unrealized Loss on Derivative Instruments	(19.1)	(22.1)	(44.5)
Change in Unrealized Loss on Derivative Instruments	1.6	0.3	22.3
Unrealized Loss on Derivative Instruments, Reclassification adjustments into earnings	(1.0)	6.0	6.6
Unrealized Loss on Derivative Instruments, Income tax effect	(2.4)	(3.3)	(6.5)
Ending Balance, Unrealized Loss on Derivative Instruments	(20.9)	(19.1)	(22.1)
Beginning Balance, Post-Retirement Benefit Plans	(107.7)	(78.2)	(131.1)
Change in Post-Retirement Benefit Plans	(0.9)	(57.3)	71.0
Post-Retirement Benefit Plans, Reclassification adjustments into earnings	13.5	10.1	13.8
Post-Retirement Benefit Plans, Income tax effect	(4.8)	17.7	(31.9)
Ending Balance, Post-Retirement Benefit Plans	(99.9)	(107.7)	(78.2)
Other Comprehensive Income Change in Component	(56.1)	(136.3)	120.5
Reclassification adjustments into earnings, Total	12.5	16.1	20.4
Income tax effect, Total	(6.8)	14.5	(39.0)
Accumulated other comprehensive income (loss), net of tax	$ (198.8)	$ (148.4)	$ (42.7)	$ (144.6)

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Foreign Operations (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign operations data
Revenues	$ 378.7	$ 386.2	$ 365.3	$ 319.7	$ 401.4	$ 397.2	$ 365.8	$ 286.6	$ 1,449.9	$ 1,451.0	$ 1,321.0
Identifiable assets	$ 6,894.2				6,919.9				$ 6,894.2	6,919.9	6,535.5
Foreign Operations (Textual) [Abstract]
Maximum percentage of consolidated revenues derive from any individual foreign country									10.00%
Percentage of company's identifiable assets	10.00%								10.00%
Foreign [Member]
Foreign operations data
Revenues									$ 329.4	346.2	332.1
Identifiable assets	$ 1,992.3				2,133.3				1,992.3	2,133.3	2,199.2
United States [Member]
Foreign operations data
Revenues									1,120.5	1,104.8	988.9
Identifiable assets	$ 4,901.9				$ 4,786.6				$ 4,901.9	$ 4,786.6	$ 4,336.3

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Legal Proceedings and Other Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) case	Jan. 31, 2016 case	Sep. 30, 2015 case	Dec. 31, 2014 USD ($)	Oct. 02, 2013 Insurance_Provider	Dec. 14, 2012 Employee Corporations	Jun. 29, 2009 Car
Loss Contingencies [Line Items]
Accruals for losses related to probable litigation matters | $	$ 1.9
Number of sites for which the Company is involved in environmental remediation	18,000,000
Accruals for remediation and restoration | $	$ 13.2			$ 13.8
Viareggio [Member]
Loss Contingencies [Line Items]
Number of casualties							32
Number of subsidiaries						2
Number of Italian railway companies | Corporations						4
Number of employees						18
Number of insurers | Insurance_Provider					3
Asbestos - related cases pending against the company and its subsidiaries			80
Legal Fees | $	$ 12.2
Number of Maintenance and Supervisory employees | Employee						10.0
Court Proceedings			1
Percentage of coverage held by Liberty Mutual Insurance Europe Limited					25.00%
Asbestos Issue [Member]
Loss Contingencies [Line Items]
New cases filed number	5,000,000
Cases dismissed or settled	26,000,000
Pending Litigation [Member] | Asbestos Cases [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Asbestos - related cases pending against the company and its subsidiaries		79,000,000
Pending Litigation [Member] | Asbestos Cases [Member] | Subsequent Event [Member] | Jones Act claims [Member]
Loss Contingencies [Line Items]
Asbestos - related cases pending against the company and its subsidiaries		63,000,000
Punctured and Ignited [Member] | Viareggio [Member]
Loss Contingencies [Line Items]
number of railcars | Car							1
Overturned [Member] | Viareggio [Member]
Loss Contingencies [Line Items]
number of railcars | Car							5
Derailed [Member] | Viareggio [Member]
Loss Contingencies [Line Items]
number of railcars | Car							14

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Financial Data of Business Segments (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) Segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Provision for Income Taxes, Equity Method Investment									$ (0.5)	$ 18.3	$ 16.5
Number of business segments | Segment									4
Profitability
Lease revenue									$ 1,130.1	1,086.6	975.2
Marine operating revenue									235.0	286.3	275.1
Other revenue									84.8	78.1	70.7
Total Revenues	$ 378.7	$ 386.2	$ 365.3	$ 319.7	$ 401.4	$ 397.2	$ 365.8	$ 286.6	1,449.9	1,451.0	1,321.0
Maintenance expense									326.1	337.0	294.0
Marine operating expense									155.9	197.8	189.8
Depreciation									290.5	273.5	255.0
Operating lease expense									87.2	108.7	129.4
Other operating expense									38.4	28.9	26.1
Total Expenses									898.1	945.9	894.3
Net gain on asset dispositions									79.2	87.2	85.6
Interest expense, net									(155.1)	(158.4)	(166.6)
Other (expense) income									(13.2)	(13.5)	(8.4)
Share of affiliates' earnings (pre-tax)									45.4	67.8	92.3
Segment profit (loss)									508.1	488.2	429.6
SG&A									192.4	189.2	178.3
Income tax benefit									110.9	75.7	65.5
Net Income	58.2	$ 39.5	$ 45.4	$ 62.2	58.5	$ 51.3	$ 53.1	$ 42.1	205.3	205.0	169.3
Disposition Gains on Owned Assets									90.3	63.1	60.0
Nonoperating Income, Residual Sharing Income									13.4	9.4	10.8
Nonremarketing Disposition Gain (Loss)									9.4	16.0	20.7
Asset Impairment Charges									(33.9)	(1.3)	(5.9)
Selected Balance Sheet Data
Investments in affiliated companies	348.5				357.7				348.5	357.7	354.3
Identifiable assets	6,894.2				6,919.9				6,894.2	6,919.9	6,535.5
Capital Expenditures
Portfolio investments and capital additions									$ (714.7)	(1,030.5)	(859.6)
Rail North America [Member]
Segment Reporting Information [Line Items]
Leverage level expressed as a ratio of recourse debt to equity									5
Profitability
Lease revenue									$ 930.9	864.1	758.9
Marine operating revenue									0.0	0.0	0.0
Other revenue									75.9	63.4	58.2
Total Revenues									1,006.8	927.5	817.1
Maintenance expense									264.2	265.5	228.2
Marine operating expense									0.0	0.0	0.0
Depreciation									215.1	190.0	176.7
Operating lease expense									82.2	103.7	124.4
Other operating expense									26.2	21.9	18.4
Total Expenses									587.7	581.1	547.7
Net gain on asset dispositions									67.2	72.3	67.7
Interest expense, net									(102.1)	(98.4)	(106.0)
Other (expense) income									(5.2)	(7.2)	(9.8)
Share of affiliates' earnings (pre-tax)									0.5	7.9	10.3
Segment profit (loss)									379.5	321.0	231.6
Disposition Gains on Owned Assets									66.6	57.4	51.1
Nonoperating Income, Residual Sharing Income									0.8	5.2	3.4
Nonremarketing Disposition Gain (Loss)									2.3	10.4	14.5
Asset Impairment Charges									(2.5)	(0.7)	(1.3)
Selected Balance Sheet Data
Investments in affiliated companies	12.0				17.2				12.0	17.2	31.4
Identifiable assets	4,629.1				4,358.2				4,629.1	4,358.2	3,710.3
Capital Expenditures
Portfolio investments and capital additions									$ (524.5)	(810.6)	(502.4)
Rail International [Member]
Segment Reporting Information [Line Items]
Leverage level expressed as a ratio of recourse debt to equity									2
Profitability
Lease revenue									$ 172.9	188.6	180.2
Marine operating revenue									0.0	0.0	0.0
Other revenue									7.5	10.3	8.8
Total Revenues									180.4	198.9	189.0
Maintenance expense									39.6	45.9	42.9
Marine operating expense									0.0	0.0	0.0
Depreciation									43.7	47.1	43.2
Operating lease expense									0.0	0.0	0.0
Other operating expense									5.1	5.1	5.3
Total Expenses									88.4	98.1	91.4
Net gain on asset dispositions									6.8	6.0	3.7
Interest expense, net									(22.4)	(24.7)	(23.9)
Other (expense) income									(6.0)	(3.1)	(1.1)
Share of affiliates' earnings (pre-tax)									(0.3)	(0.3)	21.1
Segment profit (loss)									70.1	78.7	97.4
Disposition Gains on Owned Assets									0.0	0.6	0.3
Nonoperating Income, Residual Sharing Income									0.0	0.0	0.0
Nonremarketing Disposition Gain (Loss)									7.2	5.7	6.2
Asset Impairment Charges									(0.4)	(0.3)	(2.8)
Selected Balance Sheet Data
Investments in affiliated companies	1.4				1.8				1.4	1.8	2.0
Identifiable assets	1,117.6				1,228.8				1,117.6	1,228.8	1,296.2
Capital Expenditures
Portfolio investments and capital additions									$ (148.0)	(163.6)	(168.5)
ASC [Member]
Segment Reporting Information [Line Items]
Leverage level expressed as a ratio of recourse debt to equity									1.5
Profitability
Lease revenue									$ 4.1	4.2	4.2
Marine operating revenue									166.1	223.0	223.5
Other revenue									0.0	0.0	0.0
Total Revenues									170.2	227.2	227.7
Maintenance expense									22.3	25.6	22.9
Marine operating expense									107.2	149.2	151.3
Depreciation									14.3	13.6	12.1
Operating lease expense									5.2	5.2	5.2
Other operating expense									0.0	0.0	0.0
Total Expenses									149.0	193.6	191.5
Net gain on asset dispositions									(0.1)	(0.5)	(1.3)
Interest expense, net									(5.3)	(5.6)	(6.2)
Other (expense) income									(0.7)	(0.2)	0.2
Share of affiliates' earnings (pre-tax)									0.0	0.0	0.0
Segment profit (loss)									15.1	27.3	28.9
Disposition Gains on Owned Assets									0.0	0.0	0.0
Nonoperating Income, Residual Sharing Income									0.0	0.0	0.0
Nonremarketing Disposition Gain (Loss)									(0.1)	(0.1)	0.0
Asset Impairment Charges									0.0	(0.4)	(1.3)
Selected Balance Sheet Data
Investments in affiliated companies	0.0				0.0				0.0	0.0	0.0
Identifiable assets	284.7				286.7				284.7	286.7	271.0
Capital Expenditures
Portfolio investments and capital additions									$ (20.3)	(18.4)	(11.2)
Portfolio Management [Member]
Segment Reporting Information [Line Items]
Leverage level expressed as a ratio of recourse debt to equity									3
Profitability
Lease revenue									$ 22.2	29.7	31.9
Marine operating revenue									68.9	63.3	51.6
Other revenue									1.4	4.4	3.7
Total Revenues									92.5	97.4	87.2
Maintenance expense									0.0	0.0	0.0
Marine operating expense									48.7	48.6	38.5
Depreciation									17.4	22.8	23.0
Operating lease expense									0.0	0.0	0.0
Other operating expense									7.1	1.9	2.4
Total Expenses									73.2	73.3	63.9
Net gain on asset dispositions									5.3	9.4	15.5
Interest expense, net									(20.0)	(24.3)	(26.7)
Other (expense) income									0.0	(1.2)	1.4
Share of affiliates' earnings (pre-tax)									45.2	60.2	60.9
Segment profit (loss)									49.8	68.2	74.4
Disposition Gains on Owned Assets									23.7	5.1	8.6
Nonoperating Income, Residual Sharing Income									12.6	4.2	7.4
Nonremarketing Disposition Gain (Loss)									0.0	0.0	0.0
Asset Impairment Charges									(31.0)	0.1	(0.5)
Selected Balance Sheet Data
Investments in affiliated companies	335.1				338.7				335.1	338.7	320.9
Identifiable assets	636.5				813.3				636.5	813.3	856.9
Capital Expenditures
Portfolio investments and capital additions									(18.4)	(32.3)	(170.5)
Other [Member]
Profitability
Lease revenue									0.0	0.0	0.0
Marine operating revenue									0.0	0.0	0.0
Other revenue									0.0	0.0	0.0
Total Revenues									0.0	0.0	0.0
Maintenance expense									0.0	0.0	0.0
Marine operating expense									0.0	0.0	0.0
Depreciation									0.0	0.0	0.0
Operating lease expense									(0.2)	(0.2)	(0.2)
Other operating expense									0.0	0.0	0.0
Total Expenses									(0.2)	(0.2)	(0.2)
Net gain on asset dispositions									0.0	0.0	0.0
Interest expense, net									(5.3)	(5.4)	(3.8)
Other (expense) income									(1.3)	(1.8)	0.9
Share of affiliates' earnings (pre-tax)									0.0	0.0	0.0
Segment profit (loss)									(6.4)	(7.0)	(2.7)
Disposition Gains on Owned Assets									0.0	0.0	0.0
Nonoperating Income, Residual Sharing Income									0.0	0.0	0.0
Nonremarketing Disposition Gain (Loss)									0.0	0.0	0.0
Asset Impairment Charges									0.0	0.0	0.0
Selected Balance Sheet Data
Investments in affiliated companies	0.0				0.0				0.0	0.0	0.0
Identifiable assets	$ 226.3				$ 232.9				226.3	232.9	401.1
Capital Expenditures
Portfolio investments and capital additions									(3.5)	(5.6)	(7.0)
Parent [Member]
Profitability
Income tax benefit									110.4	$ 94.0	$ 82.0
Cardinal Marine [Domain]
Profitability
Asset Impairment Charges									19.0
Cardinal Marine [Domain] | Portfolio Management [Member]
Profitability
Asset Impairment Charges									$ 19.0

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Selected Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property																	$ 99.7	$ 79.3		$ 80.7
State deferred tax rate change impact																	14.1	0.0		0.0
Equity Method Investment, Summarized Financial Information, Income Tax																	15.4	15.2
Special termination benefits, net of tax	$ 5.6
Selected Quarterly Financial Data (unaudited)
Revenues	378.7		$ 386.2		$ 365.3		$ 319.7		$ 401.4		$ 397.2		$ 365.8		$ 286.6		1,449.9	1,451.0		1,321.0
Net income	$ 58.2		$ 39.5		$ 45.4		$ 62.2		$ 58.5		$ 51.3		$ 53.1		$ 42.1		$ 205.3	$ 205.0		$ 169.3
Share Data
Basic earnings per share (in dollars per share)	$ 1.38	[1]	$ 0.92	[1]	$ 1.04	[1]	$ 1.41	[1]	$ 1.32	[1]	$ 1.16	[1]	$ 1.17	[1]	$ 0.92	[1]	$ 4.76	$ 4.55	[1]	$ 3.64
Diluted earnings per share (in dollars per share)	$ 1.37	[1]	$ 0.91	[1]	$ 1.03	[1]	$ 1.39	[1]	$ 1.30	[1]	$ 1.14	[1]	$ 1.15	[1]	$ 0.90	[1]	$ 4.69	$ 4.48	[1]	$ 3.59
Portfolio Management [Member]
Asset Impairment Charges			$ 31.1
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ (9.0)		$ (4.5)
Selected Quarterly Financial Data (unaudited)
Revenues																	$ 92.5	$ 97.4		$ 87.2
Nordic Vessels [Member] | Portfolio Management [Member]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property																	(21.6)
Foreign Tax Authority [Member]
Equity Method Investment, Summarized Financial Information, Income Tax																	$ 7.7			$ 7.6

[1] (1)Quarterly earnings per share may not be additive, as per share amounts are computed independently for each quarter and the full year is based on the respective weighted average common shares and common stock equivalents outstanding.(2)In the third quarter of 2015, net income included $31.1 million of net impairment losses and $4.5 million of net disposition gains, both related to the decision to exit the majority of the marine investments within the Portfolio Management segment.(3)In the fourth quarter of 2015, net income included $9.0 million of net disposition gains related to the decision to exit the majority of the marine investments within the Portfolio Management segment. In addition, we recorded $14.1 million of expense attributable to an increase in our effective state income tax rate, $7.7 million of benefit resulting from a reduction in the statutory income tax rate in the UK, and $5.6 million of net expenses associated with an early retirement program offered to certain employees.

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Subsequent Events (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Long-term Debt, Gross	$ 4,178.4	$ 4,178.2
Recourse Fixed Rate Debt Unsecured Twenty One [Member]
Subsequent Event [Line Items]
Long-term Debt, Gross	$ 0.0	100.0
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.70%
Recourse Fixed Rate Debt Unsecured Twenty Two [Member]
Subsequent Event [Line Items]
Long-term Debt, Gross	$ 0.0	250.0
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	4.75%
Recourse Fixed Rate Debt Unsecured Twenty Three [Member]
Subsequent Event [Line Items]
Long-term Debt, Gross	$ 0.0	$ 70.0
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.75%

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Schedule I - Condensed Financial Information of Registrant - Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 202.4	$ 209.9	$ 379.7	$ 234.2
Operating assets and facilities, net	5,698.4	5,688.0
Investments in affiliated companies	348.5	357.7	354.3
Other assets	312.4	211.4
Total Assets	6,894.2	6,919.9	6,535.5
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	170.9	165.9
Debt	4,204.2	4,256.6
Other liabilities	220.6	246.1
Total Liabilities	5,614.0	5,605.9
Total Shareholders’ Equity	1,280.2	1,314.0	1,397.0
Total Liabilities and Shareholders’ Equity	6,894.2	6,919.9
Parent Company [Member]
Assets
Cash and cash equivalents	147.6	162.3	$ 294.6	$ 183.5
Operating assets and facilities, net	3,373.6	3,397.0
Investments in affiliated companies	2,255.3	2,199.5
Other assets	709.4	396.0
Total Assets	6,485.9	6,154.8
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	72.0	54.9
Debt	4,107.7	3,821.1
Other liabilities	1,026.0	964.8
Total Liabilities	5,205.7	4,840.8
Total Shareholders’ Equity	1,280.2	1,314.0
Total Liabilities and Shareholders’ Equity	$ 6,485.9	$ 6,154.8

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Schedule I - Condensed Financial Information of Registrant - Statements of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Lease revenue									$ 1,130.1	$ 1,086.6	$ 975.2
Other revenue									84.8	78.1	70.7
Total Revenues	$ 378.7	$ 386.2	$ 365.3	$ 319.7	$ 401.4	$ 397.2	$ 365.8	$ 286.6	1,449.9	1,451.0	1,321.0
Maintenance expense									326.1	337.0	294.0
Depreciation									290.5	273.5	255.0
Operating lease expense									87.2	108.7	129.4
Other operating expense									38.4	28.9	26.1
Selling, general and administrative									192.4	189.2	178.3
Total Expenses									1,090.5	1,135.1	1,072.6
Net gain on asset dispositions									79.2	87.2	85.6
Interest expense, net									(155.1)	(158.4)	(166.6)
Other (expense) income									(13.2)	(13.5)	(8.4)
Income before Income Taxes and Share of Affiliates’ Earnings									270.3	231.2	159.0
Income tax benefit									(110.9)	(75.7)	(65.5)
Share of affiliates' earnings (net of tax)									45.9	49.5	75.8
Net Income	$ 58.2	$ 39.5	$ 45.4	$ 62.2	$ 58.5	$ 51.3	$ 53.1	$ 42.1	205.3	205.0	169.3
Foreign currency translation adjustments									(55.8)	(79.1)	25.8
Unrealized gain (loss) on securities									(0.6)	(0.1)	0.8
Unrealized gain (loss) on derivative instruments									(1.8)	3.0	22.4
Post-retirement benefit plans									7.8	(29.5)	52.9
Other comprehensive income (loss)									(50.4)	(105.7)	101.9
Comprehensive Income									154.9	99.3	271.2
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Lease revenue									718.3	669.7	543.0
Other revenue									66.7	60.2	51.3
Total Revenues									785.0	729.9	594.3
Maintenance expense									233.6	227.6	176.5
Depreciation									164.8	147.7	131.1
Operating lease expense									61.7	83.0	89.5
Other operating expense									25.4	17.1	12.7
Selling, general and administrative									149.2	139.7	131.1
Total Expenses									634.7	615.1	540.9
Net gain on asset dispositions									48.0	67.9	68.6
Interest expense, net									(68.7)	(66.7)	(63.7)
Other (expense) income									0.0	2.5	(7.0)
Income before Income Taxes and Share of Affiliates’ Earnings									129.6	118.5	51.3
Income tax benefit									(62.4)	(41.7)	(10.7)
Share of affiliates' earnings (net of tax)									138.1	128.2	128.7
Net Income									205.3	205.0	169.3
Foreign currency translation adjustments									(55.8)	(79.1)	25.8
Unrealized gain (loss) on securities									(0.6)	(0.1)	0.8
Unrealized gain (loss) on derivative instruments									(1.8)	3.0	22.4
Post-retirement benefit plans									7.8	(29.5)	52.9
Other comprehensive income (loss)									(50.4)	(105.7)	101.9
Comprehensive Income									$ 154.9	$ 99.3	$ 271.2

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Schedule I - Condensed Financial Information of Registrant - Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities
Net cash provided by operating activities	$ 534.3	$ 449.2	$ 400.7
Investing Activities
Purchases of leased-in assets	(118.4)	(150.5)	(61.4)
Proceeds from sale-leasebacks	0.0	0.0	90.7
Portfolio proceeds and other	482.2	264.0	385.3
Net cash used in investing activities	(307.6)	(878.5)	(403.2)
Financing Activities
Repayments of debt (original maturities longer than 90 days)	(726.3)	(819.8)	(602.8)
Net increase (decrease) in debt with original maturities of 90 days or less	(64.5)	50.0	(251.3)
Proceeds from issuances of debt (original maturities longer than 90 days)	748.8	1,223.0	1,132.2
Stock repurchases	(125.4)	(124.6)	(68.6)
Dividends	(68.2)	(62.0)	(60.5)
Net cash (used in) provided by financing activities	(229.0)	262.2	149.1
Net (decrease) increase in cash and cash equivalents during the period	(7.5)	(169.8)	145.5
Cash and Cash Equivalents at beginning of period	209.9	379.7	234.2
Cash and Cash Equivalents at end of period	202.4	209.9	379.7
Parent Company [Member]
Operating Activities
Net cash provided by operating activities	412.5	219.5	104.3
Investing Activities
Capital additions	602.9	748.1	513.5
Purchases of leased-in assets	(118.4)	(150.5)	(61.4)
Proceeds from sale-leasebacks	0.0	0.0	90.7
Portfolio proceeds and other	208.7	169.5	320.7
Net cash used in investing activities	(512.6)	(729.1)	(163.5)
Financing Activities
Repayments of debt (original maturities longer than 90 days)	(350.0)	(692.2)	(483.8)
Net increase (decrease) in debt with original maturities of 90 days or less	(69.0)	69.0	(185.0)
Proceeds from issuances of debt (original maturities longer than 90 days)	695.7	1,188.7	967.0
Stock repurchases	(125.4)	(124.6)	(68.6)
Dividends	(68.2)	(62.0)	(60.5)
Other	2.3	(1.6)	1.2
Net cash (used in) provided by financing activities	85.4	377.3	170.3
Net (decrease) increase in cash and cash equivalents during the period	(14.7)	(132.3)	111.1
Cash and Cash Equivalents at beginning of period	162.3	294.6	183.5
Cash and Cash Equivalents at end of period	$ 147.6	$ 162.3	$ 294.6

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Label	Element	Value
AOCI Attributable to Parent [Member]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	$ 101,900,000